Somebody should tell us, right at the start of our lives, that we are dying. Then we might live life to the limit, every minute of every day. Do it! I say. Whatever you want to do, do it now! There are only so many tomorrows.

Physics does not change the nature of the world it studies, and no science of behavior can change the essential nature of man, even though both sciences yield technologies with a vast power to manipulate the subject matters.

The work of art, just like any fragment of human life considered in its deepest meaning, seems to me devoid of value if it does not offer the hardness, the rigidity, the regularity, the luster on every interior and exterior facet, of the crystal.

Of all human activities, man's listening to God is the supreme act of his reasoning and will.

Nothing makes one feel so strong as a call for help.

No more war! Never again war! If you wish to be brothers, drop your weapons.

Technological society has succeeded in multiplying the opportunities for pleasure, but it has great difficulty in generating joy.