“If you can’t explain it to a six year old, you don’t understand it yourself.”

God is subtle but he is not malicious.

Only a life lived for others is a life worthwhile.

You can never solve a problem on the level on which it was created.

If you want to live a happy life, tie it to a goal, not to people or things.

A question that sometimes drives me hazy: am I or are the others crazy?

Science without religion is lame, religion without science is blind.

Science without religion is lame, religion without science is blind.

Information is not knowledge.

Once you stop learning, you start dying.

It is not that I’m so smart. But I stay with the questions much longer.

A clever person solves a problem. A wise person avoids it.

A man should look for what is, and not for what he thinks should be.

Time is an illusion.

The pursuit of truth and beauty is a sphere of activity in which we are permitted to remain children all our lives.

The true sign of intelligence is not knowledge but imagination

The world is a dangerous place to live, not because of the people who are evil, but because of the people who don’t do anything about it.