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

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

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.

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

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.

It wasn't a glorious or grand act of misadventure but it was a start. It wasn't what I should have done but it was what I truly wanted to do.

Grace is free sovereign favor to the ill-deserving.

I'm always looking for things that make me kind of uncomfortable.

I think school is a place where thinking should be taught.

Barry Goldwater once said, "I'd rather be right than president." I can't tell you how much I disagree with that Barry Goldwater.

What we don't understand we don't possess.

Braving obstacles and hardships is nobler than retreat to tranquility. The butterfly that hovers around the lamp until it dies is more admirable than the mole that lives in a dark tunnel.

Sometime, It's easier to love someone with flaws you can forgive in return for them forgiving yours.

Most remarks that are worth making are commonplace remarks. The things that makes them worth saying is that we really mean them.

It's nice to go into your doom. It's so liberating.