Only in thought is man a God; in action and desire we are the slaves of circumstance.

Neither acquiescence in skepticism nor acquiescence in dogma is what education should produce.

Never try to discourage thinking, for you are sure to succeed.

Brief and powerless is man's life; on him and all his race the slow, sure doom falls pitiless and dark.

St. Paul introduced an entirely novel view of marriage, that it existed primarily to prevent the sin of fornication. It is just as if one were to maintain that the sole reason for baking bread is to prevent people from stealing cake.

The happiness that is genuinely satisfying is accompanied by the fullest exercise of our faculties and the fullest realization of the world in which we live.

To the primitive mind, everything is either friendly or hostile; but experience has shown that friendliness and hostility are not the conceptions by which the world is to be understood.