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April 10, 2026
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"In a vacuum which is imagined as infinite there cannot be local differences, both on account of its infinity, and also because of the fact that the vacuum, if it exists, would have no nature but a privation, and therefore it can have no natural differences."
"Few have attained to consummate wisdom in the perfection of philosophy: Solomon attained to it, and Aristotle in relation to his times, and in a later age Avicenna, and in our own days the recently deceased Robert, Bishop of Lincoln, and Adam Marsh."
"And since the proportions of the human voice and the gesticulations of the human body are regulated by the same modulation as that by which sound and the motion of other bodies are, musical thought is subalternated not only to the harmony of human voice and gesticulation, but also of instruments and of those whose delectation consist in motion or sound and with these the harmony of the celestial and non-celestial. And since the concordance of times and the composition and harmony of the lower world and of all things composed of four elements come from celestial motions, and, moreover, since it is necessary to find the harmony of causes in their effects, the study of music also extends to knowing the proportions of times and the constitution of the elements of the lower world, and even the composition of all the elements."
"[Grosseteste is] excelling in merits, illustrious for holiness of life, like the morning star discerned through a gap in the clouds, like a candle not put under a bushel, but on a candlestick, that all may see the light."
"Vacuum stands and remains a mathematical space. A cube placed in a vacuum would not displace anything, as it would displace air or water in a space already containing those fluids."
"The highest part of the human soul, which is called the intelligence and which is not the act of any body and does not need for its proper operation a corporeal instrument—this intelligence, if it were not obscured and weighed down by the mass of the body, would itself have complete knowledge from the irradiation received from the superior light without the help of sense, just as it will have when the soul is drawn forth from the body, and as perhaps those people have who are free from the love and the imaginings of corporeal things."
"Because the purity of the eye of the soul is obscured and weighed down by the corrupt body, all the powers of this rational soul born in man are laid hold of by the mass of the body and cannot act and so in a way are asleep. Accordingly, when in the process of time the senses act through many interactions of sense with sensible things, the reasoning is awakened mixed with these very sensible things and is borne along in the senses to the sensible things as in a ship. But the functioning reason begins to divide and separately consider what in sense were confused. ...But the reasoning does not know this to be actually universal except after it has made this abstraction from many singulars, and has reached one and the same universal by its judgement taken from many singulars."
"The experimental universal is acquired by us, whose mind's eye is not purely spiritual, only through the help of the senses. For when the senses several times observe two singular occurrences, of which one is the cause of the other or is related to it in some other way, and they do not see the connection between them... And from this perception repeated again and again and stored in memory, and from the sensory knowledge from which the perception is built up, the functioning of the reasoning begins. The functioning reason therefore begins to wonder and to consider whether things really are as the sensible recollection says, and these two lead the reason to experiment... But when he has administered many times with the sure exclusion of all other things [that could be mistaken for the cause]... then there is formed in the reason this universal... and this is the way in which it comes from sensation to a universal experimental principle."
"I say that it is possible to have some knowledge without the help of the senses. For in the Divine Mind all knowledge exists from eternity, and not only is there in it certain knowledge of universals but also of all singulars. ...Similarly, intelligence receiving irradiation from the primary light see all knowable things, both universal and singulars, in the primary light itself. Moreover, the Divine Mind, in the reflection of its intelligence upon Itself, knows the very things which come after Itself, because it is itself their cause. Therefore, those who are without any senses have true knowledge."
"The first corporeal form, which some call corporeity, I hold to be light. For light of its own nature diffuses itself in all directions, so that from a point of light a sphere of light of any size may be instantly generated, provided an opaque body does not get in the way. Corporeity is what necessarily follows the extension of matter in three dimensions, since each of these, that is corporeity and matter, is a substance simple in itself and lacking all dimensions. But simple form in itself and in dimension lacking matter and dimension, it was impossible for it to become extended in every direction except by multiplying itself and suddenly diffusing itself in every direction and in its diffusion extending matter; since it is not possible for form to do without matter because it is not separable, nor can matter itself be purged of form. And, in fact, it is light, I suggest, of which this operation is part of the nature, namely, to multiply itself and instantaneously diffuse itself in every direction. Therefore, whatever it is that produces this operation is either light itself or something that produces this operation in so far as it participates in light, which produces it by its own nature. Corporeity is therefore either this light, or is what produces the operation in question and produces dimensions in matter in so far as it participates in this light itself and acts by virtue of this same light. But for the first form to produce dimensions in matter by virtue of a subsequent form is impossible. Therefore light is not the form succeeding this corporeity, but is this corporeity itself."
"One cause, in so far as it is one, is productive of only one effect. I do not rule out several efficient causes of which one is nearer and another more remote in the same order. Thus when I say simply 'animal', I do not exclude another substance or particular substance. Hence motion, in so far as it is one, is productive of only one effect. But motion is present in every body from an intrinsic principle which is called natural. Therefore an efficient cause simply proportional to the motion is present in all bodies. But nothing is present in common in every body except primitive matter and primitive form and magnitude, which necessarily follows from these two, and whatever is entailed by magnitude as such, as position and shape. But simply through magnitude a body does not receive motion, as is clear enough when Aristotle shows that everything that moves is divisible, not, therefore, simply because of magnitude or something entailed by magnitude is a body productive of motion. Nor is primitive matter productive of motion, because it is itself passive. It is therefore necessary that motion follow simply from the primitive form as from an efficient cause."
"That is better and more valuable which requires fewer, other circumstances being equal, just as that demonstration is better, other circumstances being equal, which necessitates the answering of a smaller number of questions for a perfect demonstration or requires a smaller number of suppositions and premises from which the demonstration proceeds. For if one thing were demonstrated from many and another thing from fewer equally known premisses, clearly that is better which is from fewer because it makes us know quickly, just as a universal demonstration is better than particular because it produces knowledge from fewer premises. Similarly in natural science, in moral science, and in metaphysics the best is that which needs no premisses and the better that which needs the fewer, other circumstances being equal."
"I hold that the first form of a body is the first corporeal mover. But this is light, which as it multiplies itself and expands without the body of matter moving with it, makes its passage instantaneously through the transparent medium and is not motion but a state of change. But, indeed, when light is expanding itself in different directions it is incorporated with matter, if the body of matter extends with it, and it makes a rarefaction or augmentation of matter; for when light is itself charged with the body of matter, it produces condensation or rarefaction. So when light generates itself in one direction drawing matter with it, it produces local motion; and when light within matter is sent out and what is outside is sent in, it produces qualitative change. From this it is clear that corporeal motion is a multiplicative power of light, and this is a corporeal and natural appetite."
"The space of the real physical world must be considered full, that is a plenum, because a vacuum could have no physical existence."
"This part of optics, when well understood, shows us how we may make things a very long distance off appear as if placed very close, and large near things appear very small, and how we may make small things placed at a distance appear any size we want, so that it may be possible for us to read the smallest letters at incredible distances, or to count sand, or seed, or any sort of minute objects."
"Every operation in nature is in the shortest, best ordered, briefest, and best possible way."
"The diligent investigator of natural phenomena can give the causes of all natural effects... by the rules and roots and foundations given from the power of geometry."
"No one really knew the sciences except the Lord Robert, Bishop of Lincoln, by reason of his length of life and experience, as well as of his studiousness and zeal. He knew mathematics and perspective, and there was nothing which he was unable to know; and at the same time he was sufficiently acquainted with languages to be able to understand the saints and the philosophers and the wise men of antiquity but his knowledge of languages was not such as to enable him to effect translations until the latter portion of his life..."
"Power from natural agents may go by a short line, and then in its activity greater... But if by a straight line then its action is stronger and better, as Aristotle says in Book V of the Physics, because nature operates in the shortest way possible. But the straight line is the shortest of all, as he says in the same place."
"Ostensive demonstration is that which concludes directly to that which is in question. Reduction ad impossibile is that which, when something the opposite of that which is in question has been assumed, concludes with some other proposition directly to a known and manifest impossibility, from the opposite of which the investigator is led back to the original proposition in question. But there is a difference between ostensive demonstration and reduction ad impossibile, because the former proves from things prior in the order of nature but the latter from things posterior in the order of nature. When things prior in nature are better known in the intellect of the person making the demonstration the process is carried out ostensively; but when posterior things are better known to his intellect then the demonstration is carried out per impossibile... in demonstration carried out per impossibile the showing of the original thing in question is carried out by means of things posterior to it in the order of nature... And there is in the contrary, falsely supposed in predicate of subject, a connecting term by which something is implied to be which impossible in the nature of things."
"In the thirteenth century Robert Grosseteste wrote a book on the rainbow that began an outburst of European speculation parallel to the equally rich Arab work."
"I shall tell, as I have herdOf the byshop Saint Roberd;His tonaine is Grossteste,Of Lyncolne so seyth the geste:He loved moche to here the harpe,For mannes wit it makyth sharpe;Next hys chamber, besyde hys studyHys harper's chamber was fast the by.Many tymes, by nightes and dayes,He hadd solace of notes and layes.On asked hyme the reason whyHe had delyte in mynstrelsy;He answered hym in this manereWhy he held the harpe so dere:The virtu of the harpe, through skyll and ryght,Will destrye the fendy's myght;And to the cros, by gode skeyl,Ys the harpe lykened well."
"The head is borne towards the heavens and has two lights, as it were the sun and moon."
"Robert Grosseteste. Robert Grosthead or Greathead. Robert Grosse capitas Lincolniensis. ...first chancellor of the University of Oxford; first lecturer to the Oxford Franciscans. ...English mathamatician, astronomer, physicist, philosopher, translator from Greek into Latin. He was the main organizer of philosophical studies at Oxford, and his influence was strongly felt in England for at least a couple of centuries. Nor was it limited to England. His insistence on the necessity of studying Greek and basing natural philosophy upon mathematics and experiment was extremely beneficial and far-reaching; in this he was clearly the forerunner of his most famous pupil, Roger Bacon. We may say that he influenced the whole western world, partly through his own writings, and partly through these new tendencies emphasized by Bacon and others."
"To compare him to the modern doctors is as the comparison of the sun to the moon when it is eclipsed."
"Just as the light of the sun irradiates the organ of vision and things visible, enabling the former to see and the latter to be seen, so too the irradiation of a spiritual light brings the mind into relation with that which is intelligible."
"He was an open confuter of both Pope and King, the corrector of monks, the director of priests, the instructor of clerks, the supporter of scholars, a preacher to the people, a persecutor of the incontinent, the unwearied student of the Scriptures, a hammer and despiser of the Romans. At the table of bodily refreshment he was hospitable, eloquent, courteous, pleasant, and affable; at the spiritual table devout, tearful, and contrite. In the episcopal office he was sedulous, dignified, and indefatigable."
"Grosseteste's contribution was to emphasize the importance of falsification in the search for true causes and to develop the method of verification and falsification into a systematic method of experimental procedure."
"Groesseteste appears to have been the first medieval writer to recognize and deal with the two fundamental methodological problems of induction and experimental verification and falsification which arose when the Greek conception of geometrical demonstration was applied to the world of experience. He appears to have been the first to set out a systematic and coherent theory of experimental investigation and rational explanation by which the Greek geometrical method was turned into modern experimental science. As far as is known, he and his successors were the first to use and exemplify such a theory in the details of original research into concrete problems."
"Grosseteste was the first medieval writer to break with the ancient tradition of discounting refraction in the rainbow. In another way, however, Grosseteste is firmly bound to his predecessors' rainbows—an experimentalist in principle, in practice he strays very little from the Aristotelian tradition of selective observation constrained by geometry. Furthermore, Grosseteste's rainbow theory often appeals to authority, leading historian Bruce Eastwood to remark: "When sources fail, he invents, and the invention is never contradictory to literary sources." (In fairness, Grosseteste made several observations about the rainbow that gainsaid ancient authority.)"
"The strategic act by which Grosseteste and his thirteenth- and fourteenth-century successors created modern experimental science was to unite the experimental habit of the practical arts with the rationalism of twelfth-century philosophy."
"The consideration of lines, angles and figures is of the greatest utility since it is impossible for natural philosophy to be known without them... All causes of natural effects have to be given through lines, angles and figures, for otherwise it is impossible for the reason why (propter quid) to be known in them."
"He was the first of the Bishops of the Victorian age to show what the duties of a bishop were. He may truly be said to have recast the whole idea of the Episcopate, and to have successfully raised the tone of clerical life."
"I do not quite like hearing you, for you make me cry."
"The bench of Bishops has in its time contributed much to the eloquence, as well as to the appearance and dignity of the Upper House. During the last half century its most noted orator was Samuel Wilberforce, Bishop of Oxford and Winchester, whose eloquence was of a very high order and, like his character, suggested the great ecclesiastical statesman rather than the divine. He leaped into fame by a speech on the Corn Laws in June, 1846, of which his biographer says that it ought to have been heard rather than read."
"Modern liberalism: a heartless steam engine."
"Is it on your grandmother’s or grandfather’s side that you are descended from an ape?"
"A resolution to attend theatres or operas is an absolute disqualification for Holy Orders."
"The Bishop was the Holy Terror of his time; he shows up on the wrong side of every dispute."
"Shabby, word-eating, pocket-picketing, sacrilegious villains."
"I admired and liked him most before he became a Bishop, and before he leant so much to those High Church views which did harm."
"Elsdon was once a market town as some say, and a city according to others; but as the annals of the parish were lost several centuries ago, it is impossible to determine what age it was either the one or the other. There are not the least traces of the former grandeur to be found, whence some antiquaries are apt to believe that it lost both its trade and charter at the Deluge."
"If I was not assured by the best authority on earth that the world is to be destroyed by fire, I should conclude that the day of destruction is at hand, but brought on by means of an agent very opposite to that of heat."
"I have lost the use of everything but my reason, though my head is entrenched in three night-caps, and my throat, which is very bad, is fortified by a pair of stockings twisted in the form of a cravat."
"I lay in the parlour between two beds to keep me from being frozen to death, for as we keep open house the winds enter from every quarter, and are apt to sweep into bed to me."
"As washing is very cheap, I wear two shirts at a time, and, for want of a wardrobe, I hang my great coat upon my own back, and generally keep on my boots in imitation of my namesake of Sweden. Indeed, since the snow became two feet deep (as I wanted a 'chaappin of Yale' from the public-house), I made an offer of them to Margery the maid, but her legs are too thick to make use of them, and I am told that the greater part of my parishioners are not less substantial, and notwithstanding this they are remarkable for agility."
"His appearance and air are dignified, placid, grave, and mild, but cold, and rather distancing. He is extremely well bred, nevertheless, and his half-hour's visit passed off without effort or constraint."
"Mr. Hurd, the supposed author of this performance, is one of those valuable authors who cannot be read without improvement. To a great fund of well-digested reasoning, he adds a clearness of judgment, and a niceness of penetration, capable of taking things from their first principles, and observing their most minute differences. I know few writers more deserving of the great, though prostituted name, of critic; but, like many critics, he is better qualified to instruct, than to execute. His manner appears to me harsh and affected, and his style clouded with obscure metaphors, and needlessly perplexed with expressions exotic, or technical. His excessive praises (not to give them a harsher name) of a certain living critic and divine, disgust the sensible reader, as much as the contempt affected for the same person, by many who are very unqualified to pass a judgment upon him."
"As to Gibbon, I have read a part of his third volume. Though a writer of sense, parts, and industry, I read him with little pleasure. His loaded and luxuriant style is disgusting to the last degree; and his work is polluted every where by the most immoral as well as irreligious insinuations."
"Mr. Burke's book [Reflections on the Revolution in France] is very entertaining, and, what is better, contains much truth and sound political reflection, though sometimes dressed in a fantastic mode of expression. I hope the innovating humour will decline among us, and that men will be satisfied in being happy after the old way."