Coincidence is a spiritual pun.

What a glorious garden of wonders the lights of Broadway would be to anyone lucky enough to be unable to read.

Physical science is like simple addition: it is either infallible or it is false.

Life is serious all the time, but living cannot be. You may have all the solemnity you wish in your neckties, but in anything important (such as sex, death, and religion), you must have mirth or you will have madness.

Boyhood is a most complex and incomprehensible thing. Even when one has been through it, one does not understand what it was. A man can never quite understand a boy, even when he has been the boy.

The traveler sees what he sees, the tourist sees what he has come to see.

Great truths can only be forgotten and can never be falsified.