Beautiful thoughts hardly bring us to God until they are acted upon. No one can have a true idea of right until he does it.

To become a popular religion, it is only necessary for a superstition to enslave a philosophy.

For better or worse, man is the tool-using animal, and as such he has become the lord of creation. When he is lord also of himself, he will deserve his self-chosen title homo sapiens.

All faith consists essentially in the recognition of a world of spiritual values behind, yet not apart from, the world of natural phenomena.

Events in the past may be roughly divided into those which probably never happened and those which do not matter.

Experience is a good teacher, but her fees are very high.

The wise man is he who knows the relative value of things.