All human development, no matter what form it takes, must be outside the rules; otherwise we would never have anything new.

You can't have a better tomorrow if you are thinking about yesterday all the time.

High achievement always takes place in the framework of high expectation.

An inventor is simply a fellow who doesn't take his education too seriously.

Keep on going and the chances are you will stumble on something, perhaps when you are least expecting it. I have never heard of anyone stumbling on something sitting down.

A problem well stated is a problem half-solved.

You will never stub your toe standing still. The faster you go, the more chance there is of stubbing your toe, but the more chance you have of getting somewhere.

The only time you mustn't fail is the last time you try.

here is a great difference between knowing a thing and understanding it. You can know a lot and not really understand anything.

The world hates change, yet it is the only thing that has brought progress.

If you're doing something the same way you have been doing it for ten years, the chances are you are doing it wrong.

I'm sad now, the way we're talking is infinitely sad: faded music, faded paper flowers, worn satin, an echo of an echo. All gone away, no longer possible.

War is an option of difficulties.

My skin is so thin that the innocent words of others burn holes right through me.

I don't race cars.

Questions would be asked. Answers would be ignored.

Let us face it: 'deep down' nobody in his right mind can visualize his own existence without assuming that he has always lived and will live hereafter.

Humanity is now experiencing history's most difficult evolutionary transformation.

When you struggle hard and lose money, you're a hero. When you start making money you become a capitalist swine.

There are few things more dishonorable than misleading the young.

Curing environmental ills requires not a stance outside nature, but a stance within nature, a role not as onlooker without, but as an actor within.