If a man knows not life which he hath seen, how shall he know death, which he hath not seen?

There is no permanent absolute unchangeable truth; what we should pursue is the most convenient arrangement of our ideas.

Adversity, if a man is set down to it by degrees, is more supportable with equanimity by most people than any great prosperity arrived at in a single lifetime.

The youth of an art is, like the youth of anything else, its most interesting period.

A man should have any number of little aims about which he should be conscious and for which he should have names, but he should have neither name for, nor consciousness concerning the main aim of his life.

Science is being daily more and more personified and anthromorphized into a god. By and by they will say that science took our nature upon him, and sent down his only begotten son, Charles Darwin, or Huxley, into the world so that those who believe in him, &c.; and they will burn people for saying that science, after all, is only an expression for our ignorance of our own ignorance.

There is a photographer in every bush, going about like a roaring lion seeking whom he may devour.