I simply imagine it so, then go about to prove it.

It is my conviction that pure mathematical construction enables us to discover the concepts and the laws connecting them, which gives us the key to the understanding of nature ... In a certain sense, therefore, I hold it true that pure thought can grasp reality, as the ancients dreamed.

Never memorize something that you can look up.

Necessity is the mother of all invention.

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

I am a Jew, but I am enthralled by the luminous figure of the Nazarene….No one can read the Gospels without feeling the actual presence of Jesus.

Only a life lived for others is a life worth while . I have no special gift. I am only passionately curious . I want to know God's thoughts... all the rest are details. Joy in looking and comprehending is nature's most beautiful gift. It's not that I'm so smart , it's just that I stay with problems longer.