Oh, come! That boot is on the other leg. Why should you call me to account for eating decently? If I battened on the scorched corpses of animals, you might well ask me why I did that

We call the one side [of humanity] religion, and we call the other science. Religion is always right. ... Science is always wrong; it is the very artifice of men. Science can never solve one problem without raising ten more problems.

A day's work is a day's work, neither more nor less, and the man or woman who does it needs a day's sustenance, a night's repose and due leisure, whether they be painter or ploughman.

A man is like a phonograph with half-a-dozen records. You soon get tired of them all; and yet you have to sit at table whilst he reels them off to every new visitor.

Choose silence of all virtues, for by it you hear other men's imperfections, and conceal your own.

It is the mark of a truly intelligent person to be moved by statistics.

All progress depends on the unreasonable man.