Every good mathematician is at least half a philosopher, and every good philosopher is at least half a mathematician.

Well is it known that ambition can creep as well as soar.

We may, to be more precise, have to relinquish the notion, explicit or implicit, that changes of paradigm carry scientists and those who learn from them closer and closer to the truth.

I have studied these things - you have not.

The human being, corrupted to the root, can neither desire nor perform anything but evil.

Criticism actually says: You must free your I so completely from all limitations that it becomes a human I. I say: Free yourself as far as you can, and you have done your part; because it is not given to everyone to break through all limits, or, more eloquently: that is not a limit for everyone which is one to the others. Consequently, don't exhaust yourself on the limits of others; it's enough if you tear down your own. Who has ever been able to break down even one limit for all people? Aren't countless people today, as at all times, running around with all the "limitations of humanity"? One who overturns one of his limits may have shown others the way and the means; the overturning of their limits remains their affair.

A man may be humble through vainglory.

Friends are not primarily absorbed in each other. It is when we are doing things together that friendship springs up - painting, sailing ships, praying, philosophizing, fighting shoulder to shoulder. Friends look in the same direction. Lovers look at each other - that is, in opposite directions. To transfer bodily all that belongs to one relationship into the other is blundering.

We are not simple people who believe in happiness; nor weaklings who crumple to the ground in distress at the first reverse; nor skeptics observing the bloody effort of marching humanity from the lofty heights of a mocking, sterile wit. Believing in the fight, though we entertain no illusions about it, we are armed against every disappointment.

The conformation of his mind was such that whatever was little seemed to him great, and whatever was great seemed to him little. Serious business was a trifle to him, and trifles were his serious business.

I was sitting in a chair in the patent office at Bern when all of sudden a thought occurred to me: If a person falls freely he will not feel his own weight. I was startled. This simple thought made a deep impression on me. It impelled me toward a theory of gravitation.

The vessel, though her masts be firm, beneath her copper bears a worm.

Yes, I am in favor of censorship, but it has to be conducted by people like me. And that's the difficulty (laughs). I'm in favor of encouraging every possible form of self-restraint and parental control. And I certainly don't think that pornography should be protected under the American Constitution.

Philosophy stands in the same relation to the study of the actual world as masturbation to sexual love.

The new science of communication is percept, not concept.

If he is not Nature herself, he is certainly the nature of Nature, and is the soul of the Soul of the world, if he is not the soul herself.

The mixture of children and men is precisely one of the most beautiful features of aristocratic government. All roles are distributed wisely in the world: that of the young is to do good, and that of old age is to prevent evil. The impetuosity of young men, who demand only action and creation, is very useful to the State; but they are too likely to innovate and destroy, and they would do much evil without the elderly, who are there to stop them. The latter in their turn oppose even useful reforms; they are too inflexible, they do not know how to accommodate themselves to circumstances, and sometimes a twenty-year old senator can very well be placed beside another of eighty.

I acknowledge that history is full of religious wars: but we must distinguish; it is not the multiplicity of religions which has produced wars; it is the intolerant spirit animating that which believed itself in the ascendant.

If the brutes have consciousness and no souls, then it is clear that, in them, consciousness is a direct function of material changes; while, if they possess immaterial subjects of consciousness, or souls, then, as consciousness is brought into existence only as the consequence of molecular motion of the brain, it follows that it is an indirect product of material changes. The soul stands related to the body as the bell of a clock to the works, and consciousness answers to the sound which the bell gives out when it is struck.

And in these foure things, Opinion of Ghosts, Ignorance of second causes, Devotion towards what men fear, and Taking of things Casuall for Prognostics, consisteth the Natural seed of Religion; which by reason of the different Fancies, Judgements, and Passions of severall men, hath grown up into ceremonies so different, that those which are used by one man, are for the most part ridiculous to another.

With a drunken man do not walk on the road.

An intellectual is a person who has discovered something more interesting than sex.

Psychic communal integration, made possible at last by the electronic media, could create the universality of consciousness foreseen by Dante when he predicted that men would continue as no more than broken fragments until they were unified into an inclusive consciousness...This is a new interpretation of the mystical body of Christ; and Christ, after all, is the ultimate extension of man.

Inventors and geniuses have almost always been looked on as no better than fools at the beginning of their career, and very frequently at the end of it also.

Impurity is caused by attitude, not events.

Let's not be dazzled by the sententious glitter with which error and lying often cover themselves. Society is not created by the crowd, and bodies come together in vain when hearts reject each other. The truly sociable man is more difficult in his relationships than others; those which consist only in false appearances cannot suit him. He prefers to live far from wicked men without thinking about them, than to see them and hate them. He prefers to flee his enemy rather than seek him out to harm him. A person who knows no other society than that of the heart will not seek his society in your circles. That is How J.J. must have thought and behaved before the conspiracy of which he is the object.

We must not always judge of the generality of the opinion by the noise of the acclamation.

I pray you, magnificent Sir, do not trouble yourself to return to us, but await our coming to you.

Underlying even the so-called problem of knowledge there is simply this human feeling, just as underlying the inquiry into the "why," the cause, there is simply the search for the "wherefore," the end. All the rest is either to deceive oneself or to wish to deceive others; and to wish to deceive others in order to deceive oneself.

I am a mariner of Odysseus with heart of fire but with mind ruthless and clear.

Each new technology is a reprogramming of sensory life.

In the days before machinery men and women who wanted to amuse themselves were compelled, in their humble way, to be artists. Now they sit still and permit professionals to entertain them by the aid of machinery. It is difficult to believe that general artistic culture can flourish in this atmosphere of passivity.

100 per cent of us die, and the percentage cannot be increased.

There are depths in man which go down the length of the lowest Hell, as there are heights which reach the highest Heaven; - for are not both Heaven and Hell made out of him, everlasting Miracle and Mystery that he is?

No human being, even the most passionately loved and passionately loving, is ever in our possession.

So remember this principle when something threatens to cause you pain: the thing itself was no misfortune at all; to endure it and prevail is great good fortune.

A mollusk is a cheap edition [of man] with a suppression of the costlier illustrations, designed for dingy circulation, for shelving in an oyster-bank or among the seaweed.

The human mind loves the bondage of words and is apt, when freed from one form of their tyranny, to set up another more oppressive than the last. The highest function of philosophy is to enforce the attitude of meditation and therewithal restrain the excessive volubility of the tongue. To us it seems that the reflective thinker wins his greatest victories when by what he says he compels us to recognise the relative insignificance of anything he can say. His task is not to capture Reality, but to free it from captivity.

The more I reflect on it, the more I must admire how completely nature had taught him; how completely he was devoted to his work, to the task of his life, and content to let all pass by unheeded that had not relation to this. It is a singular fact, for example, that though a man of such openness and clearness, he had never, I believe, read three pages of Burns's poems. Not even when all about him became noisy and enthusiastic, I the loudest, on that matter, did he feel it worth while to renew his investigation of it, or once turn his face towards it. The poetry he liked (he did not call it poetry) was truth, and the wisdom of reality. Burns, indeed, could have done nothing for him. As high a greatness hung over his world as over that of Burns - the ever-present greatness of the Infinite itself. Neither was he, like Burns, called to rebel against the world, but to labor patiently at his task there, uniting the possible with the necessary to bring out the real, wherein also lay an ideal.

The desire to philosophize from the standpoint of standpointlessness, as a purportedly genuine and superior objectivity, is either childish, or, as is usually the case, disingenuous.

The man of flesh and bone; the man who is born, suffers, and dies-above all, who dies; the man who eats and drinks and plays and sleeps and thinks and wills; the man who is seen and heard; the brother, the real brother.

How do we remember the parts of our histories we'd rather forget?

In ressentiment morality, love for the "small," the "poor," the "weak," and the "oppressed" is really disguised hatred, repressed envy, an impulse to detract, etc., directed against the opposite phenomena: "wealth," "strength," "power," "largesse." When hatred does not dare to come out into the open, it can be easily expressed in the form of ostensible love-love for something which has features that are the opposite of those of the hated object. This can happen in such a way that the hatred remains secret. When we hear that falsely pious, unctuous tone (it is the tone of a certain "socially-minded" type of priest), sermonizing that love for the "small" is our first duty, love for the "humble" inspirit, since God gives "grace" to them, then it is often only hatred posing as Christian love.

Ethics occupies a central place in philosophy because it is concerned with sin, with the origin of good and evil and with moral valuations. And since these problems have a universal significance, the sphere of ethics is wider than is generally supposed. It deals with meaning and value and its province is the world in which the distinction between good and evil is drawn, evaluations are made and meaning is sought.

I am often accused of expressing contempt and despising religious people. I don't despise religious people, I despise what they stand for. I like to quote the British journalist Johann Hari who said, "I have so much respect for you, that I cannot respect your ridiculous ideas."

As the mathematics are now understood, each branch - or, if you please, each problem, - is but the study of the relations of a collection of connected objects, without parts, without any distinctive characters, except their names or designating letters. These objects are commonly called points; but to remove all notion of space relations, it may be better to name them monads. The relations between these points are mere complications of two different kinds of elementary relations, which may be termed immediate connection and immediate non-connection. All the monads except as serve as intermediaries for the connections have distinctive designations.

The guiding question of Marx's analysis was, How does capitalist society supply its members with the necessary use-values? And the answer disclosed a process of blind necessity, chance, anarchy and frustration. The introduction of the category of use-value was the introduction of a forgotten factor, forgotten, that is, by the classical political economy which was occupied only with the phenomenon of exchange value. In the Marxian theory, this factor becomes an instrument that cuts through the mystifying reification of the commodity world.