As soon as men know that they can kill without fear of punishment or blame, they kill; or at least they encourage killers with approving smiles.

Only an indirect method is effective. We do nothing if we have not first drawn back.

Truth is one, but error is manifold.

The only hope of socialism resides in those who have already brought about in themselves, as far as is possible in the society of today, that union between manual and intellectual labor which characterizes the society we are aiming at.

We do not obtain the most precious gifts by going in search of them but by waiting for them.

If you want to know what a man is really like, take notice of how he acts when he loses money.

A science which does not bring us nearer to God is worthless.