love is always in danger of being sentimentalized.

The great danger is that in the confession of any collective sin, one shall confess the sins of others and forget our own.

The primary battle which religion must fight today is the battle to justify its own existence.

Nature, left to itself, defeats nature.

the principal sources of human misery may fairly be said to lie in the over-possession, under-possession, and the unwise use of economic goods.

while religion is ethical, it by no means follows that ethics is religion.

the most common type of pessimism is neither philosophical nor religious: it is the pessimism of thwarted desire. ... It is the cynical sneer of the man who, seeking roses, finds only ashes.