The legitimate powers of government extend to such acts only as are injurious to others. It does me no injury for my neighbor to say there are twenty gods or no god. It neither picks my pocket nor breaks my leg.

A preoccupation with the next world clearly shows an inability to cope credibly with this one.

The philosophy of Atheism represents a concept of life without any metaphysical Beyond or Divine Regulator. It is the concept of an actual, real world with its liberating, expanding and beautifying possibilities, as against an unreal world, which, with its spirits, oracles, and mean contentment has kept humanity in helpless degradation.

I never considered a difference of opinion in politics, in religion, in philosophy, as cause for withdrawing from a friend.

A little philosophy inclineth man's mind to atheism, but depth in philosophy bringeth men's minds about to religion.

Nonetheless, it still remains true that as a set of cognitive beliefs, religious doctrines constitute a speculative hypothesis of an extremely low order of probability.