Put your hand on a hot stove for a minute, and it seems like an hour. Sit with a pretty girl for an hour, and it seems like a minute. That's relativity.

Life is like riding a bicycle. To keep your balance you must keep moving.

Remembering that I'll be dead soon is the most important tool I've ever encountered to help me make the big choices in life. Because almost everything — all external expectations, all pride, all fear of embarrassment or failure - these things just fall away in the face of death, leaving only what is truly important. Remembering that you are going to die is the best way I know to avoid the trap of thinking you have something to lose. You are already naked. There is no reason not to follow your heart.

Science without religion is lame, religion without science is blind.

You have enemies? Good. That means you've stood up for something, sometime in your life.

Mistakes are always forgivable, if one has the courage to admit them.

We must respect other religions, even as we respect our own. Mere tolerance thereof is not enough.

It takes 20 years to build a reputation and five minutes to ruin it. If you think about that, you'll do things differently.

Always be yourself, express yourself, have faith in yourself; do not go out and look for a successful personality and duplicate it.

Yes I am, I am also a Muslim, a Christian, a Buddhist, and a Jew. When asked if he was a Hindu.

Why change the world when we can change ourselves?

The sayings of Muhammad are a treasure of wisdom not only for Muslims but for all of mankind.

If you live each day as if it was your last, someday you'll most certainly be right. From his speech at Stanford University during graduation in the spring of 2005.