If the world were good for nothing else, it is a fine subject for speculation.

Without the aid of prejudice and custom, I should not be able to find my way across the room.

People do not persist in their vices because they are not weary of them, but because they cannot leave them off. It is the nature of vice to leave us no resource but in itself.

Death is the greatest evil, because it cuts off hope.

Everything is in motion. Everything flows. Everything is vibrating.

I am not, in the ordinary acceptation of the term, a good-natured man; that is, many things annoy me besides what interferes with my own ease and interest. I hate a lie; a piece of injustice wounds me to the quick, though nothing but the report of it reach me. Therefore I have made many enemies and few friends; for the public know nothing of well-wishers, and keep a wary eye on those who would reform them.

He is a hypocrite who professes what he does not believe; not he who does not practice all he wishes or approves.