Good nature is, of all moral qualities, the one that the world needs most, and good nature is the result of ease and security, not of a life of arduous struggle.

If an opinion contrary to your own makes you angry, that is a sign that you are subsciously aware of having no good reason for thinking as you do. [...] The most savage controversies are those about matters as to which there is no good evidence either way. Persecution is used in theology, not in arithmetic, because in arithmetic there is knowledge, but in theology there is only opinion. So whenever you find yourself getting angry about a difference of opinion, be on your guard; you will probably find, on examination, that your belief is going beyond what the evidence warrants.

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

Every housemaid expects at least once a week as much excitement as would have lasted a Jane Austen heroine throughout a whole novel.

Americans need rest, but do not know it. I believe this to be a large part of the explanation of the crime wave in the United States.

The practice of inhibiting impulses, which is to a great extent necessary to civilized life, makes mistakes easier, by preventing experience of the actions to which a desire would otherwise lead, and by often causing the inhibited impulses themselves to be unnoticed or quickly forgotten.

Mathematics is, I believe, the chief source of the belief in eternal and exact truth, as well as a sensible intelligible world.