As soon as man does not take his existence for granted, but beholds it as something unfathomably mysterious, thought begins.

An optimist is a person who sees a green light everywhere, while a pessimist sees only the red stoplight... The truly wise person is color-blind.

As we acquire more knowledge, things do not become more comprehensible, but more mysterious.

A man can do only what he can do. But if he does that each day he can sleep at night and do it again the next day.

Exhaust the little moment. Soon it dies. And be it gash or gold it will not come Again in this identical guise.

Any genuine philosophy leads to action and from action back again to wonder, to the enduring fact of mystery.

I thought that it was strange to assume that it was abnormal for anyone to be forever asking questions about the nature of the universe, about what the human c…