When I was in college, I wanted to be involved in things that would change the world.

Insanity is doing the same thing over and over again and expecting different results.

You need a little bit of insanity to do great things.

I think nature's imagination Is so much greater than man's, she's never going to let us relax.

Never let the future disturb you. You will meet it, if you have to, with the same weapons of reason which today arm you against the present.

Surround yourself only with people who are going to take you higher.

People who say it cannot be done should not interrupt those who are doing it.

I can be changed by what happens to me. But I refuse to be reduced by it.

It is our choices...that show what we truly are, far more than our abilities.

Change will not come if we wait for some other person, or if we wait for some other time. We are the ones we've been waiting for. We are the change that we seek.

The three things that are most essential to achievement are common sense, hard work and stick-to-it-iv-nes

Crave for a thing, you will get it. Renounce the craving, the object will follow you by itself.

Winners and losers aren't born, they are the products of how they think

If you put off everything till you're sure of it, you'll never get anything done.

Don't find fault, find a remedy; anybody can complain

Great work requires great and persistent effort for a long time. … Character has to be established through a thousand stumbles.

Once you learn to quit, it becomes a habit.

When written in Chinese, the word 'crisis' is composed of two characters. One represents danger, the other opportunity.

The world is the great gymnasium where we come to make ourselves strong.

All thinking men are atheists.

There is a candle in your heart, ready to be kindled. There is a void in your soul, ready to be filled. You feel it, don’t you?