Humanity cherishes its swaddling clothes; but it shall not grow up unless it can free itself from them. Turning down his mother's breast does not make the weaned child ungrateful. ... Rise up naked, valiant; make the sheaths crack; push aside the stakes; to grow straight you need no more than the thrust of your sap and the call of the sun.

Obtain from yourself all that makes complaining useless. No longer implore from others what you yourself can obtain.

I have no use for knowledge that has not been preceded by a sensation

To love the truth is to refuse to let oneself be saddened by it.

There are admirable potentialities in every human being.

The public always prefers to be reassured. There are those whose job this is. There are only too many.

I have never produced anything good except by a long succession of slight efforts.