It is a miracle that curiosity survives formal education.

Relativity teaches us the connection between the different descriptions of one and the same reality.

I am content in my later years. I have kept my good humor and take neither myself nor the next person seriously.

You cannot prepare for war and peace at the same time.

Scientific greatness is less a matter of intelligence than character; if the scientist refuses to compromise or accept incomplete answers and persists in grappling the most basic and difficult questions.

Once you can accept the universe as matter expanding into nothing that is something, wearing stripes with plaid comes easy.

Make everything as simple as possible, but not simpler. A man should look for what is, and not for what he thinks should be. We cannot solve our problems with the same thinking we used when we created them. A question that sometimes drives me hazy: am I or are the others crazy? Any intelligent fool can make things bigger and more complex... It takes a touch of genius - and a lot of courage to move in the opposite direction. All religions, arts and sciences are branches of the same tree. It's not that I'm so smart, it's just that I stay with problems longer.