Vices of the time; vices of the man.

Believe not much them that seem to despise riches, for they despise them that despair of them.

A prudent question is one-half of wisdom.

Philosophers make imaginary laws for imaginary commonwealths, and their discourses are as the stars, which give little light because they are so high.

I paint for myself. I don't know how to do anything else, anyway. Also I have to earn my living, and occupy myself.

It is idle to expect any great advancement in science from the superinducing and engrafting of new things upon old. We must begin anew from the very foundations, unless we would revolve for ever in a circle with mean and contemptible progress.

I've had photographs taken for portraits because I very much prefer working from the photographs than from models... I couldn't attempt to do a portrait from photographs of somebody I didn't know.