Stupidity, outrage, vanity, cruelty, iniquity, bad faith, falsehood - we fail to see the whole array when it is facing in the same direction as we.

Already at the origin of the species man was equal to what he was destined to become.

A man is not old as long as he is seeking something.

It may offend us to hear our own thoughts expressed by others: we are not sure enough of their souls.

The books one has written in the past have two surprises in store: one couldn't write them again, and wouldn't want to.

When a scientist is ahead of his times, it is often through misunderstanding of current, rather than intuition of future truth. In science there is never any error so gross that it won't one day, from some perspective, appear prophetic.

Never feel remorse for what you have thought about your wife; she has thought much worse things about you.