First Quote Added
April 10, 2026
Latest Quote Added
"Ne pleure pas, Alfred ! J'ai besoin de tout mon courage pour mourir à vingt ans !"
"At the age of 25, not having learnt anything at school nor from book, enthusiastic about science but not about study, Léon Foucault took on the task of making the work of scientists understandable to the public and of passing judgement on the value to the work of leading men of science. From the start he showed great subtlety, good judgement based on more prudence than would be expected. His first articles were remarkable; they were spiritual. He took his duties seriously. Launched, without any experience, into the highest level of science with all its confusion and problems, he was assured carrying out a role in which mediocrity would mean failure, with complete success. … Always polite, yet seeking the truth, Foucault applied carefully considered judgements. Previously an unknown, this young man with no scientific publications nor known scientific discoveries, displayed a quiet authority and frankness which irritated many leading scientists."
"To contribute usefully to the advance of science, one must sometimes not disdain from undertaking simple verifications."
"May those men who are animated by the true scientific spirit cease to believe that they are obliged to consider only subjects of public utility; ...because, one must not hide it, the field of applications, so rich and fertile today, would not take long to be blighted by sterility if it ceased to be fertilized and revivified by the beneficial light which theoretical research radiates and pours incessantly upon it."
"The phenomenon develops calmly, but it is invisible, unstoppable. One feels, one sees it born and grow steadily; and it is not in one's power to either hasten it or slow it down. Any person, brought into the presence of this fact, stops for a few moments and remains pensive and silent; and then generally leaves, carrying with him forever a sharper, keener sense of our incessant motion through space."
"Above all, we must be accurate, and it is an obligation which we intend to fulfill scrupulously."
"You are invited to come to see the Earth turn, tomorrow, from three to five, at Meridian Hall of the Paris Observatory."
"I have not drawn a very rosy picture of the magician. I did not intend to do so. To the novice entering the life and promising himself ease, indolence, and wealth, I should say, "Don't!""
"No one regards the magician today as other than an ordinary man gifted with no extraordinary powers. The spectators come, not to be impressed with awe, but fully aware that his causes and effects are natural. They come rather as a guessing committee, to spy out the methods with which he mystifies. Hundreds of eyes are upon him. Men with more knowledge of the sciences than he come to trip and expose him, and to baffle their scrutiny is the study of his life. Long years of training and exercise alone will not make a magician. … There must be some natural aptitude for the art; it must be born in a man, and can never be acquired by rule. He must be alert both in body and in mind; cool and calculating to the movement of a muscle under all circumstances; a close student of men and human nature. To these qualifications he must add the rather incongruous quality of a mind turning on contradictions. With a scientific cause he must produce a seemingly opposite effect to that warranted by order and system. I know of no life requiring such a series of opposite qualities as the magician's. And after the exercise of all these qualities I have named, resulting in the production of the most startling and novel results, the magician has not the satisfaction, like other men, of the enjoyment of his own product. He must be prepared to see it copied by others, or after a short time discovered by the public."
"The magician depends for the success of his art upon the credulity of the people. Whatever mystifies, excites curiosity; whatever in turn baffles this curiosity, works the marvelous. Of course human ignorance is no longer a source of profit to the magician, as it was in the days of the diviner, the oracle, and the soothsayer. Few believe nowadays that the magician claims any supernatural aid. I will scarcely be believed, therefore, when I tell my readers that in a few cities in Italy and Spain in which I have performed hundreds came to see me as a curiosity, impressed with the belief that for the power he gave me I had made a compact with the devil for the delivery of my soul. In these cities I have seen people reverently cross themselves when I was passing…"
"That famous trick, related by nearly every writer on Hindu jugglery, of youths tossing balls of twine in the air and climbing up on them out of sight, I did not see, nor could I find during my visit any well-authenticated evidence that it was ever done. The tricks I saw I could have imitated with little preparation. I would not presume to introduce them upon the stage."
"A so-called magician, more than a poet, must be born with a peculiar aptitude for the calling. He must first of all possess a mind of contrarieties, quick to grasp the possibilities of seemingly producing the most opposite effects from the most natural causes. He must be original and quick-witted, never to be taken unawares. He must possess, in no small degree, a knowledge of the exact sciences, and he must spend a lifetime in practice, for in the profession its emoluments come very slowly. All this is discouraging enough, but this is not all. The magician must expect the exposure of his tricks sooner or later, and see what it has required long months of study and time to perfect dissolved in an hour. The very best illusions of the best magicians of a few years ago are now the common property of traveling showmen at country fairs. I might instance the mirror illusions of Houdin; the cabinet trick of the Davenport Brothers, and the second sight of Heller — all the baffling puzzles of the days in which the respective magicians mentioned lived. All this is not a pleasant prospective picture for the aspirant for the honors of the magician."
"One can only really travel if one lets oneself go and takes what every place brings without trying to turn it into a healthy private pattern of one's own and I suppose that is the difference between travel and tourism."
"To awaken quite alone in a strange town, is one of the pleasantest sensations in the world."
"There can be no happiness if the things we believe in are different from the things we do."
"In the labs, the young make things move, and the older ones follow like parents evolving with their children."
"In fact, without any exaggeration, the current mechanism of money creation through credit is certainly the "cancer" that's irretrievably eroding market economies of private property."
"A theory is only as good as its assumptions. If the premises are false, the theory has no real scientific value. The only scientific criterion for judging the validity of a scientific theory is a confrontation with the data of experience."
"Too many theorists have a tendency to ignore facts that contradict their convictions."
"Anyone who dares to speak about an aether is regarded as an ignorant and backward mind and he can only lose his credibility in scientific circles, although in reality those who criticize him use the same concept of intermediate medium in other words, whether it be fields, an associated fluid, a probability fluid, a pilot fluid, a quantum fluid, etc."
"La soumission aux données de l'expérience est la règle d'or qui domine toute discipline scientifique."
"Any author who uses mathematics should always express in ordinary language the meaning of the assumptions he admits, as well as the significance of the results obtained. The more abstract his theory, the more imperative this obligation. In fact, mathematics are and can only be a tool to explore reality. In this exploration, mathematics do not constitute an end in itself, they are and can only be a means."
"When you are doing something, you have against you every people doing the same thing, every people doing the opposite thing, and the very large majority of people doing nothing."
"For the same reasons a music composer writes its own symphony, whereas others already did the same things, but differently."
"Gambas does not try to be compatible with Visual Basic, and will never be. I'm convinced that its syntax and internals are far better than the one's of its proprietary cousin."
"During my studies at the E.P.I.T.A., I wrote a Lisp interpreter under Windows 3.1. During six months, I discovered Windows, its stupid memory model, the Microsoft C compiler, and its numerous bugs."
"I am using many other languages, but I never forgot that I have learned and done a lot with Basic."
"The new and the old methods complete one another on numerous points, and their simultaneous use will increase our knowledge of the outer atmosphere of the Sun much more rapidly."
"The French philosophy of the eighteenth century was in full strength. Those were the years in which Voltaire ruled European opinion, and Turgot could not but take account of his influence. Yet no one could apparently be more unlike those who were especially named as the French philosophers of the eighteenth century. He remained reverential; he was never blasphemous, never blatant; he was careful to avoid giving needless pain or arousing fruitless discussion; and, while the tendency of his whole thinking was evidently removing him from the orthodoxy of the Church, his was a broader and deeper philosophy than that which was then dominant."
"His first important literary and scholastic effort was a treatise On the Existence of God. Few fragments of it remain, but we are helped to understand him when we learn that he asserted, and to the end of his life maintained, his belief in an Almighty Creator and Upholder of the Universe. It did, indeed, at a later period suit the purposes of his enemies, exasperated by his tolerant spirit and his reforming plans, to proclaim him an atheist; but that sort of charge has been the commonest of missiles against troublesome thinkers in all times."
"The greatness of Turgot now began to appear: while he performed all the duties of the seminary and studied thoroughly what was required, he gave himself to a wide range of other studies, and chiefly in two very different directions — to thought and work upon those problems in religion which transcend all theologies, and upon those problems in politics which are of vast importance in all countries, and which especially needed discussion in his own."
"Turgot could not save France from her Revolution, but he gave her, and all countries, practical, working theories on government, on the liberty of the press, on the best means of helping the poor, on the use of riches, on civil, political, and religious liberty, which are still invaluable. … He has been justly said to have founded modern political economy ; to have bequeathed to future generations ' the idea of the freedom of industry;' and to have made ready the way for the reforms which are the glory of our own day. Among Voltaire's fellow-workers there are far more dazzling personalities. But from their fiery words, exalted visions, and too glorious hopes one turns with a certain sense of relief to this quiet, strong, practical man, and understands why the people, whose instinct in judging the character of their rulers seldom betrays them in the long run, specially acclaimed Turgot as a friend."
"TURGOT ... I present today one of the three greatest statesmen who fought unreason in France between the close of the Middle Ages and the outbreak of the French Revolution —Louis XI and Richelieu being the two other. And not only this: were you to count the greatest men of the modern world upon your fingers, he would be of the number —a great thinker, writer, administrator, philanthropist, statesman, and above all, a great character and a great man. And yet, judged by ordinary standards, a failure. For he was thrown out of his culminating position, as Comptroller-General of France, after serving but twenty months, and then lived only long enough to see every leading measure to which he had devoted his life deliberately and malignantly undone; the flagrant abuses which he had abolished restored, apparently forever; the highways to national prosperity, peace, and influence, which he had opened, destroyed; and his country put under full headway toward the greatest catastrophe the modern world has seen."
"He now, in 1749, at the age of twenty two, wrote... a letter which has been an object of wonder among political thinkers ever since. Its subject was paper money. Discussing the ideas of John Law, and especially the essay of Terrasson which had supported them, he dissected them mercilessly, but in a way useful not only in those times but in these."
"In his home-life Turgot remained most frugal and laborious, treating his servants with a benevolence then accounted contemptible, and working out his quiet schemes with an infinite patience and thoroughness. When he was offered the richer Intendancy of Lyons, he would not take it. Here, as he said of himself, though he was 'the compulsory instrument of great evil,' he was doing a little good. Only a little, it might be. But if every man did the little he could — what a different world!"
"All men now allow that if any human power could have stemmed the avalanche of the French Revolution, it would have been the reforms of Turgot."
"Turgot was never dazzled; it was his greatness, if it was also his misfortune, to see men and the world exactly as they are."
"Turgot was something more even than the best man of his party. He was the best worker. While Voltaire clamoured and wept for humanity, while d'Alembert thought, Grimm wrote, Diderot talked, and Condorcet dreamed and died, Turgot laboured. Broad and bold in aim, he was yet content to do what he could. … To do one's best here and now, with the wretched tools one has to hand, in the teeth of indolence, obstinacy, and the spirit of routine, to compromise where one cannot overcome, and instead of sitting picturing some golden future, to do at once the little one can — that was this statesman's policy."
"Turgot's attempt... showed how the results that had followed Law's issues of paper money must follow all such issues. As regards currency inflation, Turgot saw that the issue of paper money beyond the point where it is convertible into coin is the beginning of disaster — that a standard of value must have value, just as a standard of length must have length, or a standard of capacity, capacity, or a standard of weight, weight. He showed that if a larger amount of the circulating medium is issued than is called for by the business of the country, it will begin to be discredited, and that paper, if its issue be not controlled by its relation to some real standard of value, inevitably depreciates no matter what stamp it bears. Turgot developed his argument with a depth, strength, clearness, and breadth, which have amazed every dispassionate reader from that day to this. It still remains one of the best presentations of this subject ever made; and what adds to our wonder is that it was not the result of a study of authorities, but was worked out wholly from his own observation and thought. Up to this time there were no authorities and no received doctrine on the subject; there were simply records of financial practice more or less vicious; it was reserved for this young student, in a letter not intended for publication, to lay down for the first time the great law in which the modern world, after all its puzzling and costly experiences, has found safety."
"Gold and silver are constituted, by the nature of things, money, and universal money, independent of all convention, and of all laws."
"Not only there does not exist, nor can exist, any other revenue than the clear produce of land, but it is the earth also that has furnished all capitals, that form the mass of all the advances of culture and commerce. It has produced, without culture, the first gross and indispensible advances of the first labourers; all the rest are the accumulated fruits of the œconomy of successive ages, since they have begun to cultivate the earth. This œconomy has effect not only on the revenues of proprietors, but also on the profits of all the members of laborious classes. It is even generally true, that, though the proprietors have more overplus, they spare less; for, having more treasure, they have more desires, and more passions; they think themselves better ensured of their fortune; and are more desirous of enjoying it contentedly, than to augment it; luxury is their pursuit. The stipendiary class, and he chiefly the undertakers of the other classes, receiving profits proportionate to their advances, talents, and activity, have, though they are not possessed of a revenue properly so called, a superfluity beyond their subsistence; but, absorbed as they generally are, only in their enterprizes, and anxious to increase their fortune; restrained by their labour from amusements and expensive passions; they save their whole superfluity, to re-convert it in other enterprizes, and augment it."
"It was nothing to him that his own caste shot out the lip and scorned him. Cold and awkward in manner, regular and austere in habit, and as pure as a good woman, of course they hated him. But it was much to him that the clergy who ruled the people were also his foes, that that very people themselves were so dull and hopeless, that they too suspected his motives and concluded that because for them every change had always been for the worse, every change always would be. Slowly, gradually, he gained the favour of the priest and the love of the flock. He could not turn their hell into heaven: he could not make earth at all what Condorcet, uplifted in noble vision, would dream it yet might be. But he could do something."
"All money is essentially merchandize."
"Every soil does not produce every material."
"The productions of the earth require long and difficult preparations, before they are rendered fit to supply the wants of men. The productions which the earth supplies to satisfy the different wants of man, will not, for the most part, administer to those wants, in the state nature affords them; it is necessary they should undergo different operations, and be prepared by art. Wheat must be converted into flour, then into bread; hides must be dressed or tanned; wool and cotton must be spun; silk must be taken from the cod; hemp and flax must be soaked, peeled, spun, and wove into different textures; then cut and sewed together again to make garments, &c. If the same man who cultivates on his own land these different articles, and who raises them to supply his wants, was obliged to perform all the intermediate operations himself, it is certain he would succeed very badly."
"The earth has been cultivated before it has been divided; the cultivation itself having been the only motive for a division, and for that law which secures to every one his property. For the first persons who have employed themselves in cultivation, have probably worked as much land as their strength would permit, and, consequently, more than was necessary for their own nourishment."
"The fate of America is already decided — Behold her independent beyond recovery. — But will She be free and happy? — Can this new people, so advantageously placed for giving an example to the world of a constitution under which man may enjoy his rights, freely exercise all his faculties, and be governed only by nature, reason and justice — Can they form such a Constitution? — Can they establish it upon a never failing foundation, and guard against every source of division and corruption which may gradually undermine and destroy it? … It is impossible not to wish ardently that this people may attain to all the prosperity of which they are capable. They are the hope of the world. They may become a model to it. They may prove by fact that men can be free and yet tranquil; and that it is in their power to rescue themselves from the chains in which tyrants and knaves of all descriptions have presumed to bind them under the pretence of the public good. They may exhibit an example of political liberty, of religious liberty, of commercial liberty, and of industry. The Asylum they open to the oppressed of all nations should console the earth. The case with which the injured may escape from oppressive governments, will compel Princes to become just and cautious; and the rest of the world will gradually open their eyes upon the empty illusions with which they have been hitherto cheated by politicians. But for this purpose America must preserve herself from these illusions; and take care to avoid being what your ministerial writers are frequently saying She will be — an image of our Europe — a mass of divided powers contending for territory and commerce, and continually cementing the slavery of the people with their own blood."
"If the land was divided among all the inhabitants of a country, so that each of them possessed precisely the quantity necessary for his support, and nothing more; it is evident that all of them being equal, no one would work for another. Neither would any of them possess wherewith to pay another for his labour, for each person having only such a quantity of land as was necessary to produce a subsistence, would consume all he should gather, and would not have any thing to give in exchange for the labour of others."
"All merchandize has the two essential properties of money, to measure and to represent all value: and in this sense all merchandize is money."
"Eripuit Coelo fulmen, mox Sceptra Tyrannis."