God grant me the serenity to accept the things I cannot change the courage to change the things I can and the wisdom to know the difference.

Ultimately evil is done not so much by evil people, but by good people who do not know themselves and who do not probe deeply.

Man's capacity for justice makes democracy possible, but man's inclination to injustice makes democracy necessary.

God grant me the serenity to accept the things I cannot change, the courage to change the things I can, and the wisdom to know the difference.

Every experience proves that the real problem of our existence lies in the fact that we ought to love one another, but do not.

There was a time when I had all the answers. My real growth began when I discovered that the questions to which I had the answers were not the important questions.

It's always wise to seek the truth in our opponents' error, and the error in our own truth.

Nationalism: One of the effective ways in which the modern man escapes life's ethical problems.

Forgiveness is the final form of love.

Religion is so frequently a source of confusion in political life, and so frequently dangerous to democracy, precisely because it introduces absolutes into the realm of relative values.

Humor is a prelude to faith and laughter is the beginning of prayer.

The surest way to damage society is to call for a "great man" to lead it. The surest way to improve society is to become a great man to lead oneself and convince others to do likewise.

I do not judge the individual based on their belief. If I were to, then I would, undoubtedly, be no better than the (religious) system that I frown upon.

It was a confusing time in my life, a really bad day at the office.

Learn something new. Try something different. Convince yourself that you have no limits.

We should be moving vigorously towards renewable energy. The technology of which is right here right now.

The five senses are the ministers of the soul.

I try to get enough sleep and exercise, try not to make mountains out of molehills, and vent a lot. I have a good team to support my work. I also do lots of mundane things, which will center me.

Going after the unknown is always fascinating, I think. It becomes part of your life, this desire to know.

To become a theoretical physicist ... you need to have a passionate love affair with the universe.

If people from Poland are called Poles, why aren't people from Holland called Holes?