Religions which have any very strong hold over men's actions have generally some instinctive basis.

It is only in marriage with the world that our ideals can bear fruit; divorced from it, they remain barren.

Dogmatism and skepticism are both, in a sense, absolute philosophies; one is certain of knowing, the other of not knowing. What philosophy should dissipate is certainty, whether of knowledge or ignorance.

A habit of basing convictions upon evidence, and of giving to them only that degree or certainty which the evidence warrants, would, if it became general, cure most of the ills from which the world suffers.

Righteousness cannot be born until self-righteousness is dead.

Diversity is essential to happiness and in Utopia there is hardly any. This is a defect in all planned social systems.

Love and knowledge led upwards to the heavens.