No one can tell me what is a good cigar - for me. I am the only judge. People who claim to know say that I smoke the worst cigars in the world. They bring their own cigars when they come to my house.

I wonder if God created man because He was disappointed with the monkey.

Truth is mighty and will prevail. There is nothing wrong with this, except that it ain't so.

I have criticized absent people so often, and then discovered, to my humiliation, that I was talking with their relatives, that I have grown superstitious about that sort of thing and dropped it.

To stand still is to fall behind.

I am not interested to know whether vivisection produces results that are profitable to the human race or doesn't...The pain which it inflicts upon unconsenting animals is the basis of my enmity toward it, and it is to me sufficient justification of the enmity without looking further.

Duties are not performed for duty's sake, but because their neglect would make the man uncomfortable. A man performs but one duty - the duty of contenting his spirit, the duty of making himself agreeable to himself.