The most agonising thing is to drop doubt into a man about his being a reality, three-dimensional - and not some other kind of reality.

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You're in bad shape. It looks like you're developing a soul.

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I am aware of myself. And, of course, the only things that are aware of themselves and conscious of their individuality are irritated eyes, cut fingers, sore teeth. A healthy eye, finger, tooth might as well not even be there. Isn't it clear that individual consciousness is just sickness?

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If we have no heretics we must invent them, for heresy is essential to health and growth.

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Those two, in paradise, were given a choice: happiness without freedom, or freedom without happiness. There was no third alternative.

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All truths are erroneous. This is the very essence of the dialectical process: today's truths become errors tomorrow; there is no final number. This truth (the only one) is for the strong alone. Weak-nerved minds insist on a finite universe, a last number; they need, in Nietzsche's words, "the crutches of certainty". The weak-nerved lack the strength to include themselves in the dialectic syllogism.

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Children are the only brave philosophers. And brave philosophers are, inevitably, children.

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We need writers who fear nothing. ("Our Goal")

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There is an excellent way to make predictions without the slightest risk of error: predict the past.

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It is an error to divide people into the living and the dead: there are people who are dead-alive, and people who are alive-alive. The dead-alive also write, walk, speak, act. But they make no mistakes; only machines make no mistakes, and they produce only dead things. The alive-alive are constantly in error, in search, in questions, in torment.

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