Why make yourself miserable saying things like, "Why do we have such bad luck? What has God done to us? What have we done to deserve this?" - all of which, if you understand reality and take it completely into your heart, are irrelevant and unsolvable. They are just things that nobody can know. Your situation is just an accident of life.

It is important to realize that in physics today, we have no knowledge of what energy is

When you get as old as I am, you start to realize that you've told most of the good stuff you know to other people anyway.

What Do You Care What Other People Think?

No problem is too small or too trivial if we can really do something about it.

I do believe that there is a conflict between science and religion ... the spirit or attitude toward the facts is different in religion from what it is in science. The uncertainty that is necessary in order to appreciate nature is not easily correlated with the feeling of certainty in faith.

The problem of creating something new, but which is consistent with everything which has been seen before, is one of extreme difficulty.