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April 10, 2026
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"To be able to speak the language of the schools with authority was the first condition of obtaining a hearing. But he was not slow to perceive that the men who taught this philosophy were, for the most part, wholly destitute of positive knowledge. They knew no language but Latin. Beyond the shreds of arithmetic, mensuration, and astronomy taught in the manuals of the Quadrivium, they were ignorant of mathematics. Of the possibility of applying mathematical knowledge to the facts of nature they had formed no conception whatever. Their philosophy was a tangle of barren controversies reducible, for the most part, to verbal disputes. It bore no relation to the facts of real life. It held out no hope of raising the Catholic Church to the position of intellectual domination needed for establishing her authority over the Asiatic world, from which dangers were looming of appalling magnitude."
"The mind of Roger Bacon was strangely compounded of almost prophetic gleams of the future course of science, and the best principles of the inductive philosophy, with a more than usual credulity in the superstitions of his own time. Some have deemed him overrated by the nationality of the English; but, if we may have sometimes given him credit for discoveries to which he has only borne testimony, there can be no doubt of the originality of his genius."
"Many of these mystics, by following what they were taught by some treatises, secretly preserved from one generation to another, achieved discoveries which would not be despised even in our modern days of exact sciences. Roger Bacon, the friar, was laughed at as a quack, and is now generally numbered among "pretenders" to magic art; but his discoveries were nevertheless accepted, and are now used by those who ridicule him the most... Roger Bacon belonged by right if not by fact to that Brotherhood which includes all those who study the occult sciences. Living in the thirteenth century, almost a contemporary, therefore, of Albertus Magnus and Thomas Aquinas, his discoveries — such as gunpowder and optical glasses, and his mechanical achievements — were considered by everyone as so many miracles. He was accused of having made a compact with the Evil One... It is recounted, that, having been summoned before the king, the friar was induced to show "some of his skill before her majesty the queen. So he waved his hand... and "presently was heard such excellent music, that they all said they had never heard the like."... Then he waved his wand again,and suddenly there was such a smell "as if all the rich perfumes in the whole world had been there prepared in the best manner that art could set them out." Thephenomena of the mystic odors and music, exhibited by Roger Bacon, have been often observed in our own time."
"Friar Bacon walk'd in Oxford between two steeples, but he that would have discovered his Thoughts, by his steps, had been more his Fool than his Fellow."
"All these foregoing sciences are, properly speaking, speculative. There is indeed in every science a practical side, as Avicenna teaches in the first book of his Art of Medicine. Nevertheless, of Moral Philosophy alone can it be said that it is in the special and autonomatic sense practical, dealing as it does with human conduct with reference to virtue and vice, beatitude and misery. All other sciences are called speculative: they are not concerned with the deeds of the present or future life affecting man's salvation or damnation. All procedures of art and of nature are directed to these moral actions, and exist on account of them. They are of no account except in that they help forward right action. Thus practical and operative sciences, as experimental alchemy and the rest, are regarded as speculative in reference to the operations with which moral or political science is concerned. This science is the mistress of every department of philosophy. It employs and controls them for the advantage of states and kingdoms. It directs the choice of men who are to study in sciences and arts for the common good. It orders all members of the state or kingdom so that none shall remain without his proper work."
"Every medieval and Renaissance court had a royal astrologer who advised the duke or prince he served. ...Men such as Roger Bacon, who even in the thirteenth century was a clear and outspoken champion of the experimental method in science, and Jerome Cardan, one of the foremost mathematicians and physicians of the sixteenth century, subscribed to astrology."
"And because this Experimental Science is wholly ignored by the general run of students, for that reason I can not convince people of its utility unless I show at the same time its excellence and its property. This science alone, then, knows how to test perfectly by experience what can be done by nature, what by the industry of art, what by imposture; what the incantations, conjurations, invocations, deprecations, sacrifices (which are magical devices) seek and dream of; and what is done in them, so that all falsity may be removed and that only the truth of art and nature be retained. This science alone teaches one to consider all the insanities of magicians, not that they may be confirmed but that they may be avoided, just as logic considers sophistical argument."
"I use the example of the rainbow and of the phenomena connected with it, of which sort are the circle around the sun and the stars, likewise the rod lying at the side of the sun or of a star which appears to the eye in a straight line... called the rod by Seneca, and the circle is called the corona, which often has the colors of the rainbow. But neither Aristotle nor Avicenna, in their Natural Histories, has given us knowledge of things of this sort, nor has Seneca, who composed a special book on them. But Experimental Science makes certain of them. [The experimenter] considers rowers and he finds the same colors in the falling drops dripping from the raised oars when the solar rays penetrate drops of this sort. It is the same with waters falling from the wheels of a mill; and when a man sees the drops of dew in summer of a morning lying on the grass in the meadow or the field, he will see the colors. And in the same way when it rains, if he stands in a shady place and if the rays beyond it pass through dripping moisture, then the colors will appear in the shadow nearby; and very frequently of a night colors appear around the wax candle. Moreover, if a man in summer, when he rises from sleep and while his eyes are yet only partly opened, looks suddenly toward an aperture through which a ray of the sun enters, he will see colors. And if, while seated beyond the sun, he extend his hat before his eyes, he will see colors; and in the same way if he closes his eye, the same thing happens under the shade of the eyebrow; and again, the same phenomenon occurs through a glass vessel filled with water, placed in the rays of the sun. Or similarly if any one holding water in his mouth sprinkles it vigorously into the rays and stands to the side of the rays; and if rays in the proper position pass through an oil lamp hanging in the air, so that the light falls on the surface of the oil, colors will be produced. And so in an infinite number of ways, as well natural as artificial, colors of this sort appear, as the careful experimenter is able to discover."
"I have labored much in sciences and languages, and I have up to now devoted forty years [to them] after I first learned the Alphabetum; and I was always studious. Apart from two of these forty years I was always [engaged] in study [or at a place of study], and I had many expenses just as others commonly have. Nevertheless, provided I had first composed a compendium, I am certain that within quarter or half a year I could directly teach a solicitous and confident person whatever I know of these sciences and languages. And it is known that no one worked in so many sciences and languages as I did, nor so much as I did. Indeed, when I was living in the other state of life [as a Magister], people marveled that I survived the abundance of my work. And still, I was just as involved in studies afterwards, as I had been before. But I did not work all that much, since in the pursuit of Wisdom this was not required."
"Mathematics is the gate and key of the sciences. ... Neglect of mathematics works injury to all knowledge, since he who is ignorant of it cannot know the other sciences or the things of this world. And what is worse, men who are thus Ignorant are unable to perceive their own ignorance and so do not seek a remedy."
"If in other sciences we should arrive at certainty without doubt and truth without error, it behooves us to place the foundations of knowledge in mathematics..."
"I shall draw... a figure (which all these matters are made clear as far as possible on a surface, but the full demonstration would require a body like the eye... The eye of a cow, pig, and other animals can be used for illustration, if anyone wishes to experiment."
"[H]aec vocatur scientia experimentalis, quae negligit argumenta, quoniam non certificant, quantumcunque sint fortia, nisi simul adsit experientia conclusionis. Et ideo haec docet experiri conclusiones nobiles omnium scientiarum, quae in aliis scientiis aut probantur per argumenta, aut investigantur per experientias naturales et imperfectas..."
"Everything in nature completes its action through its own force and species alone... as, for example, fire by its own force dries and consumes and does many things. Therefore vision must perform the act of seeing by its own force. But the act of seeing is the perception of a visible object at a distance, and therefore vision perceives what is visible by its own force multiplied to the object. Moreover, the species of the things of world are not fitted by nature to effect the complete act of vision at once, because of its nobleness. Hence these must be aided by the species of the eye, which travels in the locality of the visual pyramid, and changes the medium and ennobles it, and renders it analogous to vision, and so prepares the passage of the species itself of the visible object... Concerning the multiplication of this species, moreover, we are to understand that it lies in the same place as the species of the thing seen, between the sight and the thing seen, and takes place along the pyramid whose vertex is in the eye and base in the thing seen. And as the species of an object in the same medium travels in a straight path and is refracted in different ways when it meets a medium of another transparency, and is reflected when it meets the obstacles of a dense body; so is it also true of the species of vision that it travels altogether along the path of the species itself of the visible object."
"There are in fact four very significant stumbling blocks in the way of grasping the truth, which hinder every man however learned, and scarcely allow anyone to win a clear title to wisdom, namely, the example of weak and unworthy authority, longstanding custom, the feeling of the ignorant crowd, and the hiding of our own ignorance while making a display of our apparent knowledge."
"Many secrets of art and nature are thought by the unlearned to be magical."
"For the things of this world cannot be made known without a knowledge of mathematics. For this is an assured fact in regard to celestial things, since two important sciences of mathematics treat of them, namely theoretical astrology and practical astrology. The first … gives us definite information as to the number of the heavens and of the stars, whose size can be comprehended by means of instruments, and the shapes of all and their magnitudes and distances from the earth, and the thicknesses and number, and greatness and smallness, … It likewise treats of the size and shape of the habitable earth … All this information is secured by means of instruments suitable for these purposes, and by tables and by canons .. For everything works through innate forces shown by lines, angles and figures."
"Argument is conclusive... but... it does not remove doubt, so that the mind may never rest in the sure knowledge of the truth, unless it finds it by the method of experiment. For if any man who never saw fire proved by satisfactory arguments that fire burns, his hearer's mind would never be satisfied, nor would he avoid the fire until he put his hand in it that he might learn by experiment what argument taught."
"Et hæc scientia certificat omnia naturalia et artificialia in particulari et in propria disciplina, per experientiam perfectam; non per argumenta, ut scientiæ pure speculativae, nec per debiles et imperfecta experientias ut scientiae operativæ. Et ideo hæc est domina omnium scientiarum præcedentium, et finis totius speculationis."
"Mix together saltpetre, luru vopo vir con utriet [powdered charcoal], and sulphur, and you will make thunder and lightning, if you know the method of mixing them."
"Prudens quaestio dimidium scientiae."
"Reasoning draws a conclusion and makes us grant the conclusion, but does not make the conclusion certain, nor does it remove doubt so that the mind may rest on the intuition of truth, unless the mind discovers it by the path of experience."
"Oh how delightful is the taste of wisdom to those who are thus steeped in it from its very fount and origin. They who have not tried this cannot feel the delight of wisdom, just as a sick man cannot estimate the flavour of food. But because they are affected with this sort of mental sickness, and their intellect in this matter is as it were deaf from their very birth, so as not to appreciate the delight of harmony, on this account they grieve not at this so great loss of wisdom, though indeed without doubt it is an infinite loss."
"One man I know, and one only, who can be praised for his achievements in this science. Of discourses and battles of words he takes no heed: he follows the works of wisdom, and in these finds rest. What others strive to see dimly and blindly, like bats in twilight, he gazes at in the full light of day, because he is a master of experiment. Through experiment he gains knowledge of natural things, medical, chemical, indeed of everything in the heavens or earth. He is ashamed that things should be known to laymen, old women, soldiers, ploughmen, of which he is ignorant. Therefore he has looked closely into the doings of those who work in metals and minerals of all kinds; he knows everything relating to the art of war, the making of weapons, and the chase; he has looked closely into agriculture, mensuration, and farming work; he has even taken note of the remedies, lot casting, and charms used by old women and by wizards and magicians, and of the deceptions and devices of conjurors, so that nothing which deserves inquiry should escape him, and that he may be able to expose the falsehoods of magicians. If philosophy is to be carried to its perfection and is to be handled with utility and certainty, his aid is indispensable. As for reward, he neither receives nor seeks it. If he frequented kings and princes, he would easily find those who would bestow on him honours and wealth. Or, if in Paris he would display the results of his researches, the whole world would follow him. But since either of these courses would hinder him from pursuing the great experiments in which he delights, he puts honour and wealth aside, knowing well that his wisdom would secure him wealth whenever he chose. For the last three years he has been working at the production of a mirror that shall produce combustion at a fixed distance; a problem which the Latins have neither solved nor attempted, though books have been written upon the subject."
"For sounds like thunder, and coruscations like lightning, may be made in the air, and they may be rendered even more horrible than those of nature herself. A small quantity of matter, properly manufactured, not larger than the human thumb, may be made to produce a horrible noise and coruscation. And this may be done many ways, by which a city or an army may be destroyed, as was the case when and his men broke their pitchers and exhibited their lamps, fire issuing out of them with inestimable noise, destroyed an infinite number of the army of the Midianites."
"In a somer seson, whan softe was the sonne, I shoop me into shroudes as I a sheep were, In habite as an heremite unholy of werkes, Wente wide in this world wondres to here. Ac on a May morwenynge on Malverne hilles Me bifel a ferly, of Fairye me thoghte."
"A fair feeld ful of folk fond I ther bitwene – Of alle manere of men, the meene and the riche, Werchynge and wandrynge as the world asketh."
"For if hevene be on this erthe, and ese to any soule, It is in cloistre or in scole."
"Whan Costantyn of curteisie Holy Kirke dowed With londes and ledes, lordshipes and rentes, An aungel men herden an heigh at Rome crye, "Dos ecclesie this day hath ydronke venym, And tho that han Petres power arn apoisoned alle!""
"First impressions of mediaeval life are usually coloured by the courtly romances of Malory and his later refiners. Chaucer brings us down to reality, but his people belong to a prosperous middle-class world, on holiday and in holiday mood. Piers Plowman stands alone as a revelation of the ignorance and misery of the lower classes, whose multiplied grievances came to a head in the Peasants' Revolt of 1381."
"I kan noght parfitly my Paternoster as the preest it syngeth, But I kan rymes of Robyn Hood and Randolf Erl of Chestre."
"In preieres and penaunce putten hem manye, Al for the love of Oure Lord lyveden ful streyte In hope to have heveneriche blisse"
"For hevene myghte nat holden it, so was it hevy of hymself, Til it hadde of the erthe eten his fille. And whan it hadde of this fold flessh and blood taken, Was nevere leef upon lynde lighter therafter, And portatif and persaunt as the point of a nedle, That myghte noon armure it lette ne none heighe walles. Forthi is love ledere of the Lordes folk of hevene, And a meene, as the mair is, [inmiddes] the kyng and the commune."
"Brewesters and baksters, bochiers and cokes – For thise are men on this molde that moost harm wercheth To the povere peple"
"Capitalism is the sorcerer's apprentice: it has summoned up powers which have spun wildly out of control and now threaten to destroy us. The task of socialism is not to spur on those powers but to bring them under rational human control."
"Socialism is the completion of democracy, not the negation of it."
"There are many ways that reviewing can be dishonest. Here is one illustration, drawn from no less a personnage than the self-appointed doyen of the literature dons, Terry Eagleton. A standard rhetorical device in discursive literature has the form “some say X, but I say Y.” The author might not disagree with X, but thinks Y is the more important point. A scurrilous reviewer can systematically misrepresent the author by saying, “the author says X” and omitting the author’s rider “Y”. This is one of Eagleton’s techniques of choice (chapter and verse can be abundantly supplied). Of course, this might not be intentional on Eagleton’s part; he might merely be stupid or lazy. But since it is better to doubt this, we have to conclude instead that he is guilty of wilful misrepresentation. It is alarming to think that such are the ethics of criticism he teaches his students at Manchester University."
"Capitalism cannot survive without a working class, while the working class can flourish a lot more freely without capitalism."
"The liberal state is neutral between capitalism and its critics until the critics look like they are winning."
"Like most academic Marxists, Professor Eagleton knows that, put baldly, the doctrine of economic determinism is patently absurd. So he employs various gambits to soften or conceal the absurdity, without ever really denying the basic model of economic determinism. This is not to say that he is completely free of "vulgar Marxist" rhetoric; indeed, he sometimes sounds like nothing so much as a soapbox Marxist, railing (for example) against "a petty bourgeois liberal humanism, academically dispossessed and subordinated yet in intellectual terms increasingly hegemonic, [which] occupied the bastions of reactionary criticism from within as a dissentient bloc." Yet Professor Eagleton also takes great pains to distance himself from "vulgar Marxism"—the phrase occurs often in his works, always in his beloved scare quotes. The vulgar Marxist is a frank economic determinist and holds that the "superstructure" is a more or less direct reflection of economic processes. The sophisticated Marxist, well schooled in the writings of the Frankfurt School Marxists, allows that the superstructure is "relatively autonomous"—except when he wants to claim economic determination for some phenomenon of his own choosing. The "vulgar Marxist" is frankly Utopian and looks forward to the revolution and the establishment of a workers' paradise; a sophisticated Marxist like Professor Eagleton dandifies his utopianism with lots of high-flown rhetoric. "Once emancipated from material scarcity, liberated from labour," he writes in a typically starry-eyed passage, "[men] will live in the play of the mutual significations, move in the ceaseless 'excess' of freedom." Professor Eagleton's primary weapons against the charge of vulgar Marxism are words like "hegemony," "ideology," and "aesthetic," all of which in his hands have the wonderful property of meaning any of about six different and conflicting things."
"The most compelling confirmation of Marx's theory of history is late capitalist society. There is a sense in which this case is becoming truer as time passes."
"There seems to be something in humanity which will not bow meekly to the insolence of power."
"Ivory towers are as rare as bowling alleys in tribal cultures."
"When it comes to who exactly should be exploited, the system is admirably egalitarian."
"The truth is that the past exists no more than the future, even though it feels as though it does."
"Perhaps you thought that George Eliot was the author of Middlemarch. No: according to Professor Eagleton, the phrase “George Eliot” signifies nothing more than the insertion of certain specific ideological determinations -- Evangelical Christianity, rural organicism, incipient feminism, petty-bourgeois moralism–into a hegemonic ideological formation which is partly supported, partly embarrassed by their presence. Similarly, he tells us that Henry James, like Joseph Conrad, “is . . . no more than a particular name for . . . an aspect of the crisis of nineteenth-century realism.” The idea is to downgrade the notion of individual genius, as if George Eliot’s personal contribution to the writing of Middlemarch were somehow accidental, the more important thing being the “specific ideological determinations” she embodied. The main point of all this is that nothing is what it seems; or, as Professor Eagleton puts it in Criticism and Ideology, “there is no ‘immanent’ value”: everything in the realm of culture is determined by something outside culture–namely (catch that whiff of vulgarity?) the oppressive economic relations of capitalism."
"We face a probable future of nuclear-armed states warring over a scarcity of resources; and that scarcity is largely the consequence of capitalism itself. For the first time in history, our prevailing form of life has the power not simply to breed racism and spread cultural cretinism, drive us into war or herd us into labour camps, but to wipe us from the planet. Capitalism will behave antisocially if it is profitable for it to do so, and that can now mean human devastation on an unimaginable scale. What used to be apocalyptic fantasy is today no more than sober realism. The traditional leftist slogan ‘‘Socialism or barbarism’’ was never more grimly apposite."
"After all, if you do not resist the apparently inevitable, you will never know how inevitable the inevitable was."
"Modern capitalist nations are the fruit of a history of slavery, genocide, violence and exploitation every bit as abhorrent as Mao's China or Stalin's Soviet Union."
"In conscious life, we achieve some sense of ourselves as reasonably unified, coherent selves, and without this action would be impossible. But all this is merely at the ‘imaginary’ level of the ego, which is no more than the tip of the iceberg of the human subject known to psychoanalysis. The ego is function or effect of a subject which is always dispersed, never identical with itself, strung out along the chains of the discourses which constitute it."