First Quote Added
April 10, 2026
Latest Quote Added
"With Heisenberg's uncertainty principle, the fundamental role of experimental errors became a basic feature of physics."
"Both the uncertainty principle and the negentropy principle of information make Laplace's scheme [of exact determinism] completely unrealistic. The problem is an artificial one; it belongs to imaginative poetry, not to experimental science."
"The laws of classical mechanics represent a mathematical idealization and should not be assumed to correspond to the real laws of nature. … We now have to realize that errors are inevitable (..) a discovery that makes strict determinism impossible."
"We completely ignore the human value of the information. A selection of 100 letters is given a certain information value, and we do not investigate whether it makes sense in English, and, if so, whether the meaning of the sentence is of any practical importance. According to our definition, a set of 100 letters selected at random (according to the rules of Table 1.1), a sentence of 100 letters from a newspaper, a piece of Shakespeare or a theorem of Einstein are given exactly the same informational value."
"Les esprits partagés, s'égarant dans des routes différentes, perdent l'immense avantage qui résulterait de leurs forces réunies."
"The first step to be taken, is to study carefully the fundamental phenomenon above described, and to examine all the various circumstances under which it presents itself."
"Quantum physics is no longer an abstract theory for specialists. We must now absolutely include it in our education and also in our culture."
"Science is the future of mankind."
"It is because I know all that science can bring to the world that I shall continue my efforts to ensure that it contributes to the happiness of all men, whether they be white, black, or yellow, and not to their annihilation in the name of some divine mission or other."
"Ce qui est familier aux savants de profession a grand besoin d'ĂŞtre mis dans le domaine commun."
"It would be easier to endow a fool with intellect than to persuade him that he had none."
"Let us award a just, a brilliant homage to those rare men whom nature has endowed with the precious privilege of arranging a thousand isolated facts, of making seductive theories spring from them; but let us not forget to state, that the scythe of the reaper had cut the stalks before one had thought of uniting them into sheaves!"
"In the experimental sciences, the epochs of the most brilliant progress are almost always separated by long intervals of almost absolute repose."
"Tel est le privilége du génie : il aperçoit, il saisit des rapports, là où des yeux vulgaires lie voient que des faits isolés."
"The ancients had a taste, let us say rather a passion, for the marvellous, which caused them to forget even the sacred duties of gratitude. Observe them, for example, grouping together the lofty deeds of a great number of heroes, whose names they have not even deigned to preserve, and investing the single personage of Hercules with them. The lapse of ages has not rendered us wiser in this respect. In our own time the public delight in blending fable with history. In every career of life, in the pursuit of science especially, they enjoy a pleasure in creating Herculeses."
"I was often humiliated to see men disputing for a piece of bread, just as animals might have done. My feelings on this subject have very much altered since I have been personally exposed to the tortures of hunger. I have discovered, in fact, that a man, whatever may have been his origin, his education, and his habits, is governed, under certain circumstances, much more by his stomach than by his intelligence and his heart."
"On certain occasions, the eyes of the mind can supply the want of the most powerful telescopes, and lead to astronomical discoveries of the highest importance."
"The calculus of probabilities, when confined within just limits, ought to interest, in an equal degree, the mathematician, the experimentalist, and the statesman."
"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."
"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."
"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'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."
"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."
"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."
"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."
"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 is more or less proper to serve as a common measure, in proportion as it is more or less in general use, of a more similar quality, and more easy to be divided into aliquot parts. All is more or less applicable for the purpose of a general pledge of exchange, in proportion as it is less susceptible of decay or alteration in quantity or quality."
"All money is essentially merchandize."
"Gold and silver are constituted, by the nature of things, money, and universal money, independent of all convention, and of all laws."
"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."
"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."
"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."
"Every soil does not produce every material."
"Eripuit Coelo fulmen, mox Sceptra Tyrannis."
"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 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."
"All merchandize has the two essential properties of money, to measure and to represent all value: and in this sense all merchandize is money."
"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."
"Georges Cuvier was a great naturalist from the beginning of the 19th century, so right around 1800, and he was the first person to really say organisms go extinct...And Georges Cuvier came along and said, you know, really, essentially, if they’re out there, we would have seen them. We haven’t seen them: They’re gone. And he posited this whole lost world, which he then proceeded to start to uncover. So a lot of the animal names that we have now—for example, pterodactyl—he came up with. He was the first person to identify a pterodactyl. And his theory was that animals only went extinct in these catastrophic waves—you know, something happened, the planet changed; otherwise, why else would they go extinct? And then a naturalist named Charles Lyell, who was Charles Darwin’s mentor, came along, and he said, “That’s ridiculous. You know, we never see these catastrophes. They don’t happen. Only—the only way the Earth changes is very, very, very gradually, and things go extinct very gradually, and the world changes very gradually.” And that became sort of the doctrine for a very long time, over a hundred years, until the Alvarezes came along and identified an asteroid impact as the event that had done in the dinosaurs—and many other creatures, I should say."
"Cuvier advanced his doctrine on methodological as well as scientific grounds. Although his work was far from empirical, Cuvier adopted and promulgated an empiricist ideology in order to combat opposing points of view."
"Linnaeus and Cuvier have been my two gods, though in very different ways, but they were mere school-boys to old Aristotle."
"To spread healthy ideas among even the lowest classes of people, to remove men from the influence of prejudice and passion, to make reason the arbiter and supreme guide of public opinion; that is the essential goal of the sciences; that is how science will contribute to the advancement of civilization, and that is what deserves protection of governments who want to insure the stability of their power."
"The works which this man leaves behind him occupy a few pages only; their importance is not greatly superior to their extent."
"The natural food of man, judging from his structure, appears to consist of the fruits, roots, and other succulent parts of vegetables."
"The synthesis of paleontology, taxonomy, and comparative anatomy that Cuvier achieved was based on a teleological approach to nature, one that gave primacy to functional purpose over structural affinity."
"Why has not anyone seen that fossils alone gave birth to a theory about the formation of the earth, that without them, no one would have ever dreamed that there were successive epochs in the formation of the globe."
"It is evident that one cannot say anything demonstrable about the problem before having resolved these preliminary questions, and yet we hardly possess the necessary information to solve some of them."