Civilized society is one huge bourgeoisie: no nobleman dares now shock his greengrocer.

When a man wants to murder a tiger he calls it sport; when a tiger wants to murder him he calls it ferocity.

The moment we face it frankly we are driven to the conclusion that the community has a right to put a price on the right to live in it ... If people are fit to live, let them live under decent human conditions. If they are not fit to live, kill them in a decent human way. Is it any wonder that some of us are driven to prescribe the lethal chamber as the solution for the hard cases which are at present made the excuse for dragging all the other cases down to their level, and the only solution that will create a sense of full social responsibility in modern populations?

A man ought to be able to be fond of his wife without making a fool of himself about her.

Science can never solve one problem without raising ten more problems.

Thus, I blush to add, you can not be a philosopher and a good man, though you may be a philosopher and a great one.

If in the library of your house you do not have the works of the ancient Greek writers, then you live in a house with no light.