The premonition of madness is complicated by the fear of lucidity in madness, the fear of the moments of return and reunion, when the intuition of disaster is so painful that it almost provokes a greater madness. One would welcome chaos if one were not afraid of lights in it.

Useful undertakings which require sustained attention and vigorous precision in order to succeed often end up by being abandoned, for, in America, as elsewhere, the people move forward by sudden impulses and short-lived efforts.

I exist, that is all, and I find it nauseating.

A modern theory of knowledge which takes account of the relational as distinct from the merely relative character of all historical knowledge must start with the assumption that there are spheres of thought in which it is impossible to conceive of absolute truth existing independently of the values and position of the subject and unrelated to the social context. Even a god could not formulate a proposition on historical subjects like 2 x 2 = 4, for what is intelligible in history can be formulated only with reference to problems and conceptual constructions which themselves arise in the flux of historical experience.

Paradoxical as it may seem, a Latin prose or a geometry problem, even though they are done wrong, may be of a great service one day, provided we devote the right kind of effort to them. Should the occasion arise, they can one day make us better able to give someone in affliction exactly the help required to save him, at the supreme moment of his need.

Since men in their endeavors behave, on the whole, not just instinctively, like the brutes, nor yet like rational citizens of the world according to some agreed-on plan, no history of man conceived according to a plan seems to be possible, as it might be possible to have such a history of bees or beavers. One cannot suppress a certain indignation when one sees men's actions on the great world-stage and finds, beside the wisdom that appears here and there among individuals, everything in the large woven together from folly, childish vanity, even from childish malice and destructiveness. In the end, one does not know what to think of the human race, so conceited in its gifts.

In training a child to activity of thought, above all things we must beware of what I will call "inert ideas"-that is to say, ideas that are merely received into the mind without being utilised, or tested, or thrown into fresh combinations.In the history of education, the most striking phenomenon is that schools of learning, which at one epoch are alive with a ferment of genius, in a succeeding generation exhibit merely pedantry and routine. The reason is, that they are overladen with inert ideas. Education with inert ideas is not only useless: it is, above all things, harmful.

The next day as they were leaving Bethany, Jesus was hungry. Seeing in the distance a fig tree in leaf, he went to find out if it had any fruit. When he reached it, he found nothing but leaves, because it was not the season for figs. Then he said to the tree, “May no one ever eat fruit from you again.” And his disciples heard him say it. The next day when they came out from Bethany, He was hungry. After seeing in the distance a fig tree with leaves, He went to find out if there was anything on it. When He came to it, He found nothing but leaves, because it was not the season for figs. He said to it, "May no one ever eat fruit from you again!"

For a people who are free, and who mean to remain so, a well organized and armed militia is their best security.

Even to-day, in spite of some signs which are making a tiny breach in that sturdy faith, even to-day, there are few men who doubt that motorcars will in five years' time be more comfortable and cheaper than to-day. They believe in this as they believe that the sun will rise in the morning. The metaphor is an exact one. For, in fact, the common man, finding himself in a world so excellent, technically and socially, believes that it has been produced by nature, and never thinks of the personal efforts of highly-endowed individuals which the creation of this new world presupposed. Still less will he admit the notion that all these facilities still require the support of certain difficult human virtues, the least failure of which would cause the rapid disappearance of the whole magnificent edifice.... These traits together make up the well-known psychology of the spoilt child. Chap.

For you who no longer possess it, freedom is everything, for us who do, it is merely an illusion.

A logical theory may be tested by its capacity for dealing with puzzles, and it is a wholesome plan, in thinking about logic, to stock the mind with as many puzzles as possible, since these serve much the same purpose as is served by experiments in physical science.

An organised system of machines, to which motion is communicated by the transmitting mechanism from a central automation, is the most developed form of production by machinery.

The Register of Knowledge of Fact is called History.

And what can be more divine than the exhalations of the earth, which affect the human soul so as to enable her to predict the future ? And could the hand of time evaporate such a virtue? Do you suppose you are talking of some kind of wine or salted meat ?

Before anything else the One must exist eternally; from his power derives everything that always is or will ever be. He is the Eternal and embraces all times. He knows profoundly all events and He himself is everything. He creates everything beyond any beginning of time and beyond any limit of place and space. He is not subject to any numerical law, or to any law of measure or order. He himself is law, number, measure, limit without limit, end without end, act without form.

I once received a letter from an eminent logician, Mrs. Christine Ladd Franklin, saying that she was a solipsist, and was surprised that there were no others. Coming from a logician, this surprise surprised me.

We are always getting ready to live, but never living.

Gentile himself call his doctrine 'absolute formalism': there is no; 'matter' apart from the pure 'form' of acting. 'The only matter there is in the spiritual act is the form itself, as activity.'

Every peasant has a lawyer inside of him, just as every lawyer, no matter how urbane he may be, carries a peasant within himself.

Unless I am convinced by the testimony of the Scriptures or by clear reason (for I do not trust either in the pope or in councils alone, since it is well known that they have often erred and contradicted themselves), I am bound by the Scriptures I have quoted and my conscience is captive to the Word of God. I cannot and will not recant anything, since it is neither safe nor right to go against conscience. May God help me. Amen.

Wrong life cannot be lived rightly.

Those who claim to care about the wellbeing of human beings and the preservation of our environment should become vegetarians for that reason alone. They would thereby increase the amount of grain available to feed people elsewhere, reduce pollution, save water and energy, and cease contributing to the clearing of forests; moreover, since a vegetarian diet is cheaper than one based on meat dishes, they would have more money available to devote to famine relief, population control, or whatever social or political cause they thought most urgent. ... when nonvegetarians say that "human problems come first" I cannot help wondering what exactly it is that they are doing for human beings that compels them to continue to support the wasteful, ruthless exploitation of farm animals.

The STATE IDEA, the authoritarian principle, has been proven bankrupt by the experience of the Russian Revolution. If I were to sum up my whole argument in one sentence I should say: The inherent tendency of the State is to concentrate, to narrow, and monopolize all social activities; the nature of revolution is, on the contrary, to grow, to broaden, and disseminate itself in ever-wider circles. In other words, the State is institutional and static; revolution is fluent, dynamic. These two tendencies are incompatible and mutually destructive. The State idea killed the Russian Revolution and it must have the same result in all other revolutions, unless the libertarian idea prevail.

The art of being wise is the art of knowing what to overlook.

To suffer is the great modality of taking the world seriously.

The pursuit of philosophy is founded on the belief that knowledge is good, even if what is known is painful. A man imbued with the philosophic spirit, whether a professional philosopher or not, will wish his beliefs to be as true as he can make them, and will, in equal measure, love to know and hate to be in error. This principle has a wider scope than may be apparent at first sight.

Libraries are as the shrine where all the relics of the ancient saints, full of true virtue, and that without delusion or imposture, are preserved and reposed.

Perfect humility dispenses with modesty.

Reason nevertheless prevails in world history.

But to manipulate men, to propel them towards goals which you - the social reformer - see, but they may not, is to deny their human essence, to treat them as objects without wills of their own, and therefore to degrade them.

Absurd, irreducible; nothing - not even a profound and secret delirium of nature - could explain it. Obviously I did not know everything, I had not seen the seeds sprout, or the tree grow. But faced with this great wrinkled paw, neither ignorance nor knowledge was important: the world of explanations and reasons is not the world of existence. A circle is not absurd, it is clearly explained by the rotation of a straight segment around one of its extremities. But neither does a circle exist. This root, on the other hand, existed in such a way that I could not explain it. Reflections on a chestnut tree root.

We live together, we act on, and react to, one another; but always and in all circumstances we are by ourselves. The martyrs go hand in hand into the arena; they are crucified alone. Embraced, the lovers desperately try to fuse their insulated ecstacies into a single self-transcendence; in vain. By its very nature every embodied spirit is doomed to suffer and enjoy in solitude.

"The physical world is real." That is supposed to be the fundamental hypothesis. What does "hypothesis" mean here? For me, a hypothesis is a statement, whose truth must be assumed for the moment, but whose meaning must be raised above all ambiguity. The above statement appears to me, however, to be, in itself, meaningless, as if one said: "The physical world is cock-a-doodle-do." It appears to me that the "real" is an intrinsically empty, meaningless category (pigeon hole), whose monstrous importance lies only in the fact that I can do certain things in it and not certain others.

Diversity makes critical argument fruitful. ...[P]artners in an argument must share ...the wish to know, and the readiness to learn from the other ...by severely criticizing his views... and hearing... [the] reply. ...the so-called method of science consists in this kind of criticism.

Or, if you enjoy living with Greeks also, spend your time with Socrates and with Zeno: the former will show you how to die if it be necessary; the latter how to die before it is necessary. Live with Chrysippus, with Posidonius: they will make you acquainted with things earthly and things heavenly; they will bid you work hard over something more than neat turns of language and phrases mouthed forth for the entertainment of listeners; they will bid you be stout of heart and rise superior to threats. The only harbour safe from the seething storms of this life is scorn of the future, a firm stand, a readiness to receive Fortune's missiles full in the breast, neither skulking nor turning the back.

I was walking late one night along a tree-lined path; a chestnut fell at my feet. The noise it made as it burst, the resonance it provoked in me, and an upheaval out of all proportion to this insignificant event thrust me into miracle, into the rapture of the definitive, as if there were no more questions - only answers. I was drunk on a thousand unexpected discoveries, none of which I could make use of. This is how I nearly reached the Supreme. But instead I went on with my walk.

The state of health is a state of nonsensation, even of nonreality. As soon as we cease to suffer, we cease to exist.

I am sure that university life would be better, both intellectually and morally, if most university students had temporary childless marriages. This would afford a solution to the sexual urge neither restless nor surreptitious, neither mercenary nor casual, and of such a nature that it need not take up time which ought to be given to work.

Art is a human activity having for its purpose the transmission to others of the highest and best feelings to which men have risen.

First, [the bourgeoisie] must recognize his own impotence, his incapacity to believe in a sense of history, even if his reason leans towards the truth, the passions and prejudices produced by his class position, prevent him from accepting it. So he should not exert himself with proving the truth of the historical mission of the working class; rather, he should learn to subdue his petty bourgeois passions and prejudices. He should take lessons from those who were once as important as he is now but are ready to risk all for the revolutionary Cause.

Terror is not now, if it ever was, something that comes to us from outside. It is a part of the society in which we live. Both liberals and neoconservatives believe terrorism can be dealt with by removing its causes. The truth is less reassuring. Al-Qaeda has mutated into a decentralised, often locally based type of apocalyptic terrorism and, in this new guise, seems to be acquiring a formidable momentum.

These influences of my young childhood were greatest: 1, the mountain landscape, 2, my father the impossible idealist, and 3, the upringing of a closely-knit Christian home.

There is no version of primeval history, preceding the discoveries of modern science, that is as rational and as inspiring as that of the first eleven chapters of the Book of Genesis.

We must needs believe with faith, whatever counsels reason may give us, that in the depths of our own bodies, in animals, in plants, in rocks, in everything that lives, in all the Universe, there is a spirit that strives to know itself, to acquire consciousness of itself, to be itself - for to be oneself is to know oneself - to be pure spirit; and since it can only achieve this by means of the body, by means of matter, it creates and makes use of matter at the same time that it remains a prisoner of it.

Education to true religion is the final task of the new education.

We may well call it black diamonds. Every basket is power and civilization. For coal is a portable climate. It carries the heat of the tropics to Labrador and the polar circle; and it is the means of transporting itself withersoever it is wanted. Watt and Stephenson whispered in the ear of mankind their secret, that a half-ounce of coal will draw two tons a mile, and coal carries coal, by rail and by boat, to make Canada as warm as Calcutta, and with its comfort brings its industrial power.

Gottlob Frege created modern logic including "for all," "there exists," and rules of proof. Leibniz and Boole had dealt only with what we now call "propositional logic" (that is, no "for all" or "there exists"). They also did not concern themselves with rules of proof, since their aim was to reach truth by pure calculation with symbols for the propositions. Frege took the opposite track: instead of trying to reduce logic to calculation, he tried to reduce mathematics to logic, including the concept of number.