Freedom can never be comprehended, nor even can insight into it be gained.

A lie is the abandonment and, as it were, the annihilation of the dignity by man.

It is therefore correct to say that the senses do not err — not because they always judge rightly, but because they do not judge at all.

cruelty to animals is contrary to man's duty to himself, because it deadens in him the feeling of sympathy for their sufferings, and thus a natural tendency that is very useful to morality in relation to other human beings is weakened.

One cannot avoid a certain feeling of disgust, when one observes the actions of man displayed on the great stage of the world. Wisdom is manifested by individuals here and there; but the web of human history as a whole appears to be woven from folly and childish vanity, often, too, from puerile wickedness and love of destruction: with the result that at the end one is puzzled to know what idea to form of our species which prides itself so much on its advantages.

Science is organized knowledge. Wisdom is organized life.

There is nothing higher than reason.