If I owe Smith ten dollars and God forgives me, that doesn’t pay Smith.

Reason, observation, and experience; the holy trinity of science.

Happiness is not a reward – it is a consequence. Suffering is not a punishment – it is a result.

Surely there is grandeur in knowing that in the realm of thought, at least, you are without a chain; that you have the right to explore all heights and depth; that there are no walls nor fences, nor prohibited places, nor sacred corners in all the vast expanse of thought.

In nature there are neither rewards nor punishments; there are consequences.

Give to every human being every right that you claim for yourself.

It is a blessed thing that in every age some one has had the individuality enough and courage enough to stand by his own convictions.

I would rather live and love where death is king than have eternal life where love is not.

Hope is the only universal liar who never loses his reputation for veracity.

Insolence is not logic; epithets are the arguments of malice.