Keep your mind open to change all the time. Welcome it. Court it. It is only by examining and reexamining your opinions and ideas that you can progress.

People rarely succeed unless they have fun in what they are doing.

Remember, today is the tomorrow you worried about yesterday.

It isn't what you have, or who you are, or where you are, or what you are doing that makes you happy or unhappy. It is what you think about.

If you are not in the process of becoming the person you want to be, you are automatically engaged in becoming the person you don't want to be.

Any fool can criticize, condemn and complain - and most fools do. But it takes character and self control to be understanding and forgiving.

Most of the important things in the world have been accomplished by people who have kept on trying when there seemed to be no hope at all.

When we hate our enemies, we are giving them power over us: power over our sleep, our appetites, our blood pressure, our health, and our happiness.

Instead of worrying about what people say of you, why not spend time trying to accomplish something they will admire.

The world is so full of people who are grabbing and self-seeking. So the rare individual who unselfishly tries to serve others has an enormous advantage. He has little competition.

The successful man will profit from his mistakes and try again in a different way.

We sinned for no reason but an incomprehensible lack of love, and He saved us for no reason but an incomprehensible excess of love.

Real smart begins when you quit quoting other people.

Fool me once, shame on you. Fool me twice, shame on me. Fool me three times, shame on both of us.

Nowadays, I could not care less about making other people like me. I'm a good person, I don't need to do that anymore.

We cannot really look at the movement of the Spirit, just because It is the Power by which we do the looking.

Sometimes you have to go up really high to see how small you are.

Jews who long have drifted from the faith of their fathers... are stirred in their inmost parts when the old, familiar Passover sounds chance to fall upon their ears.

In life you can fall down 1000 times but the point is to have the willingness to stand up and to start again.

The question that motivates my research is, if we can put a man on the Moon with 100,000 [people], what can we do with 100 million?

I have tried to be as eclectic as I possibly can with my professional life, and so far it's been pretty fun.