Without effort and change, human life cannot remain good. It is not a finished Utopia that we ought to desire, but a world where imagination and hope are alive and active.

Mysticism is, in essence, little more than a certain intensity and depth of feeling in regard to what is believed about the universe.

I consider the official Catholic attitude on divorce, birth control, and censorship exceedingly dangerous to mankind.

Our individual life is brief, and perhaps the whole life of mankind will be brief if measured in astronomical scale

For my part, the thing I would wish to obtain from money would be leisure with security. But what the typical modern man desires to get with it is more money, with a view to ostentation, splendour, and the outshining of those who have hitherto been his equals.

Science, by itself, cannot supply us with an ethic. It can show us how to achieve a given end, and it may show us that some ends cannot be achieved. But among ends that can be achieved our choice must be decided by other than purely scientific considerations. If a man were to say, "I hate the human race, and I think it would be a good thing if it were exterminated," we could say, "Well, my dear sir, let us begin the process with you." But this is hardly argument, and no amount of science could prove such a man mistaken.

Human nature being what it is, people will insist upon getting some pleasure out of life.