I accept nothing on authority. A hypothesis must be backed by reason, or else it is worthless.

The metaphor is perhaps one of man's most fruitful potentialities. Its efficacy verges on magic, and it seems a tool for creation which God forgot inside one of His creatures when He made him. All our other faculties keep us within the realm of the real, of what is already there. The most we can do is to combine things or to break them up. The metaphor alone furnishes an escape; between the real things, it lets emerge imaginary reefs, a crop of floating islands. A strange thing, indeed, the existence in man of this mental activity which substitutes one thing for another - from an urge not so much to get at the first as to get rid of the second.

Our experience hitherto justifies us in trusting that nature is the realization of the simplest that is mathematically conceivable. I am convinced that purely mathematical construction enables us to find those concepts and those lawlike connections between them that provide the key to the understanding of natural phenomena. Useful mathematical concepts may well be suggested by experience, but in no way can they be derived from it. Experience naturally remains the sole criterion of the usefulness of a mathematical construction for physics. But the actual creative principle lies in mathematics. Thus, in a certain sense, I take it to be true that pure thought can grasp the real, as the ancients had dreamed.

Truly to escape Hegel involves an exact appreciation of the price we have to pay to detach ourselves from him. It assumes that we are aware of the extent to which Hegel, insidiously perhaps, is close to us; it implies a knowledge, in that which permits us to think against Hegel, of that which remains Hegelian. We have to determine the extent to which our anti-Hegelianism is possibly one of his tricks directed against us, at the end of which he stands, motionless, waiting for us.

"Genius" (which means transcendent capacity of taking trouble, first of all).

Men do not sufficiently realise that their future is in their own hands. Theirs is the task of determining first of all whether they want to go on living or not. Theirs is the responsibility, then, for deciding if they want merely to live, or intend to make just the extra effort required for fulfilling, even on their refractory planet, the essential function of the universe, which is a machine for the making of gods.

As pure a son of liberty as I have ever known.

But there is only one thing which gathers people into seditious commotion, and that is oppression.

The Philosopher of this age is not a Socrates, a Plato, a Hooker, or Taylor, who inculcates on men the necessity and infinite worth of moral goodness, the great truth that our happiness depends on the mind which is within us, and not on the circumstances which are without us; but a Smith, a De Lolme, a Bentham, who chiefly inculcates the reverse of this,-that our happiness depends entirely on external circumstances; nay, that the strength and dignity of the mind within us is itself the creature and consequence of these. Were the laws, the government, in good order, all were well with us; the rest would care for itself! Dissentients from this opinion, expressed or implied, are now rarely to be met with; widely and angrily as men differ in its application, the principle is admitted by all.

The life of man is of no greater importance to the universe than that of an oyster.

When asked why people give to beggars but not to philosophers, he replied, 'Because they expect they may become lame and blind, but never that they will become philosophers.'

I am no longer sure of anything. If I satiate my desires, I sin but I deliver myself from them; if I refuse to satisfy them, they infect the whole soul.

Whatever the virtue may be, from whatever source it may come, it is worthy of esteem... Mind, beauty, wealth, nobility, although the children of chance, all have their own value, as skill, learning and virtue have theirs.

An 'Artificial System' is one in which the 'smaller' groups (the Genera) are 'natural'; and in which the 'wider' divisions (Classes, Orders) are constructed by the 'peremptory' application of selected Characters

Thus, because Christian morals leave animals out of consideration ... therefore in philosophical morals they are of course at once outlawed; they are merely "things," simply means to ends of any sort; and so they are good for vivisection, for deer-stalking, bull-fights, horse-races, etc., and they may be whipped to death as they struggle along with heavy quarry carts. Shame on such a morality ... which fails to recognize the Eternal Reality immanent in everything that has life, and shining forth with inscrutable significance from all eyes that see the sun!

You will die, not because you are ill, but because you are alive; even when you have been cured, thesame end awaits you; when you have recovered, it will be not death, but ill health, that you have escaped.

Every book is a quotation; and every house is a quotation out of all forests and mines and stone-quarries; and every man is a quotation from all his ancestors.

Feuerbach ... recognizes ... "even love, in itself the truest, most inward sentiment, becomes an obscure, illusory one through religiousness, since religious love loves man only for God's sake, therefore loves man only apparently, but in truth God only." Is this different with moral love? Does it love the man, this man for this man's sake, or for morality's sake, for Man's sake, and so-for homo homini Deus-for God's sake?

If I shall have sufficient strength to improve and amplify what was written and published by me up to now about motion by adding some little speculations, and in particular those relating to the force of percussion, in the investigation of which I have consumed hundreds and thousands of hours, and finally reduced this to very easy explanation, so that people can understand it in less than half an hour of time.

Great men hallow a whole people and lift up all who live in their time.

Justice is a temporary thing that must at last come to an end; but the conscience is eternal and will never die.

The world is nothing but 'world-as-meaning.'

Every father is given the opportunity to corrupt his daughter's nature, and the educator, husband, or psychiatrist then has to face the music. For what has been spoiled by the father can only be made good by a father, just as what has been spoiled by the mother can only be repaired by a mother. The disastrous repetition of the family pattern could be described as the psychological original sin, or as the curse of the Atrides running through the generations.

The avant-garde and the beatniks share in the function of entertaining without endangering the good conscience of the men of good will.

...wickedness, when you examine it, turns out to be the pursuit of some good in the wrong way. You can be good for the mere sake of goodness: you cannot be bad for the mere sake of badness. You can do a kind action when you are not feeling kind and when it gives you no pleasure, simply because kindness is right; but no one ever did a cruel action simply because cruelty is wrong - only because cruelty was pleasant or useful to him. in other words badness cannot succeed even in being bad in the same way in which goodness is good. Goodness is, so to speak, itself: badness is only spoiled goodness.

Following Foucault, we may define the art of life as a practice of suicide, of giving oneself to death, of depsychologizing oneself, of playing.

They hate not to make use of their abilities... they do not necessarily work for their own self-interest.

Our time is Gothic in its spirit. Unlike the Renaissance, it is not dominated by a few outstanding personalities. The twentieth century has established the democracy of the intellect. In the republic of art and science, there are many men who take an equally important part in the intellectual movements of our age. It is the epoch rather than the individual that is important. There is no one dominant personality like Galileo or Newton. Even in the nineteenth century, there were still a few giants who outtopped all others. Today the general level is much higher than ever before in the history of the world, but there are few men whose stature immediately sets them apart from all others.

Nor is it the irrationality of the form which is taken as characteristic. On the contrary, one overlooks the irrational.

Mark at present so much; what the essence of Scandinavian and indeed of all Paganism is: a recognition of the forces of Nature as godlike, stupendous, personal Agencies,-as Gods and Demons. Not inconceivable to us. It is the infant Thought of man opening itself, with awe and wonder, on this ever-stupendous Universe. To me there is in the Norse system something very genuine, very great and manlike. A broad simplicity, rusticity, so very different from the light gracefulness of the old Greek Paganism, distinguishes this Scandinavian System. It is Thought; the genuine Thought of deep, rude, earnest minds, fairly opened to the things about them; a face-to-face and heart-to-heart inspection of the things,-the first characteristic of all good Thought in all times. Not graceful lightness, half-sport, as in the Greek Paganism; a certain homely truthfulness and rustic strength, a great rude sincerity, discloses itself here.

Will is to grace as the horse is to the rider.

The moment we no longer have a free press, anything can happen. What makes it possible for a totalitarian or any other dictatorship to rule is that people are not informed; how can you have an opinion if you are not informed? If everybody always lies to you, the consequence is not that you believe the lies, but rather that nobody believes anything any longer. This is because lies, by their very nature, have to be changed, and a lying government has constantly to rewrite its own history. On the receiving end you get not only one lie - a lie which you could go on for the rest of your days - but you get a great number of lies, depending on how the political wind blows. And a people that no longer can believe anything cannot make up its mind. It is deprived not only of its capacity to act but also of its capacity to think and to judge. And with such a people you can then do what you please.

If we tried to rely entirely on reason, and pressed it hard, our lives and beliefs would collapse - a form of madness that may actually occur if the inertial force of taking the world and life for granted is somehow lost. If we lose our grip on that, reason will not give it back to us.

The republican is the only form of government which is not eternally at open or secret war with the rights of mankind.

I lie on the beach like a crocodile and let myself be roasted by the sun. I never see a newspaper and don't give a damn for what is called the world.

The sense of mercy is found in all men; the sense of shame is found in all men; the sense of respect is found in all men; the sense of right and wrong is found in all men.

When an active individual of sound common sense perceives the sordid state of the world, desire to change it becomes the guiding principle by which he organizes given facts and shapes them into a theory. The methods and categories as well as the transformation of the theory can be understood only in connection with his taking of sides. This, in turn, discloses both his sound common sense and the character of the world. Right thinking depends as much on right willing as right willing on right thinking.

I think it is not helpful to apply Darwinian language too widely. Conquest of nation by nation is too distant for Darwinian explanations to be helpful. Darwinism is the differential survival of self-replicating genes in a gene pool, usually as manifested by individual behaviour, morphology, and phenotypes. Group selection of any kind is not Darwinism as Darwin understood it nor as I understand it. There is a very vague analogy between group selection and conquest of a nation by another nation, but I don't think it's a very helpful analogy. So I would prefer not to invoke Darwinian language for that kind of historical interpretation.

When, in the course of human development, existing institutions prove inadequate to the needs of man, when they serve merely to enslave, rob, and oppress mankind, the people have the eternal right to rebel against, and overthrow, these institutions.

It is ...easy to be certain. One has only to be sufficiently vague.

My trade and my art is living.

There slowly grew up in me an unshakable conviction that we have no right to inflict suffering and death on another living creature unless there is some unavoidable necessity for it, and that we ought all of us to feel what a horrible thing it is to cause suffering and death out of mere thoughtlessness. And this conviction has influenced me only more and more strongly with time. I have grown more and more certain that at the bottom of our heart we all think this, and that we fail to acknowledge it because we are afraid of being laughed at by other people as sentimentalists, though partly also because we allow our best feelings to get blunted. But I vowed that I would never let my feelings get blunted, and that I would never be afraid of the reproach of sentimentalism.

Many Britons...feel strongly about something which was once called "the alien wedge". And surely it cannot be doubted, even by those who profess allegiance to the "multicultural society", that our society, unlike America, is not of that kind, and therefore that immigration cannot be an object of merely passive contemplation on the part of the present citizenship. There is perhaps no greater sign of the strength of liberalism (a strength which issues, not from popular consensus, but from the political power of the liberal elite) than that it has made it impossible for any but the circumlocutory to argue that the English, the Scots and the Welsh have a prior claim to the benefits of the civilization that their ancestors created, which entitles them to reserve its benefits for themselves.

All teems with symbol; the wise man is the man who in any one thing can read another.

The end of the philosophical dialogue lies in itself; it can never serve a purpose outside of itself. Just as a sculptor does not cease to be a work of art even if it lies at the bottom of the sea, so indeed every work of philosophy endures, even if uncomprehended in its own time. One would be grateful if it were merely a matter of incomprehension. Instead, the work is usually refitted and appropriated by various entities-some playing the part of the opponent; others, that of the proponent.

Two half philosophers will probably never a whole metaphysician make.

Great feelings take with them their own universe, splendid or abject. They light up with their passion an exclusive world in which they recognize their climate. There is a universe of jealousy, of ambition, of selfishness or generosity. A universe in other words a metaphysic and an attitude of mind.

A Muslim who knows French will never be a dangerous Muslim.