When the intensity of emotional conviction subsides, a man who is in the habit of reasoning will search for logical grounds in favour of the belief which he finds in himself.

Man is a rational animal – so at least I have been told. Throughout a long life, I have looked diligently for evidence in favour of this statement, but so far I have not had the good fortune to come across it, though I have searched in many countries spread over three continents.

Laughter is the most inexpensive and most effective wonder drug. Laughter is a universal medicine.

The Eugenic Society . . . is perpetually bewailing the fact that wage-earners breed faster than middle-class people.

One of the most interesting and harmful delusions to which men and nations can be subjected is that of imagining themselves special instruments of the Divine Will.

The mind is a strange machine which can combine the materials offered to it in the most astonishing ways.

Why repeat the old errors, if there are so many new errors to commit?