I guess to me religion is a kind of moral code.

Science progresses best when observations force us to alter our preconceptions.

Science is competitive, aggressive, demanding. It is also imaginative, inspiring, uplifting.

We became astronomers thinking we were studying the universe, and now we learn that we are just studying the 5 or 10 percent that is luminous.

No observational problem will not be solved by more data.

Three of my children married Jewish people. One did not and that marriage didn't last more than half a dozen years or so. The others are still very close.

I decided I needed to give up something, so I gave up teaching.

Religion is not the most important thing.

It's certainly true that most of my close friends are Jewish.

Play keeps us vital and alive. It gives us an enthusiasm for life that is irreplaceable. Without it life just doesn't taste good.

For you was I born, for you do I have life, for you will I die, for you am I now dying.

Love is as necessary to human beings as food and shelter; [but] without intelligence, ... love is impotent and freedom unattainable.

Even when the time control has been reached, there is one situation where you want to act as if it has not: when your position is absolutely lost.

No man is able to make progress when he is wavering between opposite things.

He that cannot paint must grind the colors.

There is hook in every benefit, that sticks in his jaws that takes that benefit, and draws him whither the benefactor will.

it is amazing how all our paths of rebellion tend to lead us straight back home.

The cat does not negotiate with the mouse.