Whenever an individual or a business decides that success has been attained, progress stops. 

If you want a love message to be heard, it has got to be sent out. To keep a lamp burning, we have to keep putting oil in it.

To be in good moral condition requires at least as much training as to be in good physical condition.

War should be the politics of last resort. And when we go to war, we should have a purpose that our people understand and support.

Some mountains appear when seawater recedes.

One individual may die for an idea, but that idea will, after his death, incarnate itself in a thousand lives.

Especially for those of us who lived in single cells, you had the time to sit down and think, and we discovered that sitting down just to think is one of the best ways of keeping yourself fresh and able, to be able to address the problems facing you, and you had the opportunity, also, of examining your past.

Life is like a game of cards. The hand you are dealt is determinism; The way you play it is free will.

Spirituality begins where worldly wisdom ends.

Freedom is not worth having if it does not connote freedom to err.

I don't like to repeat success, I like to go on to other things.

Science is global. Einstein's equation, E=mc2, has to reach everywhere. Science is a beautiful gift to humanity, we should not distort it. Science does not differentiate between multiple races.