When you're curious, you find lots of interesting things to do.

People should pursue what they're passionate about. That will make them happier than pretty much anything else.

Be miserable. Or motivate yourself. Whatever has to be done, it's always your choice.

All thinking men are atheists.

I may not have gone where I intended to go, but I think I have ended up where I needed to be.

The secret of genius is to carry the spirit of the child into old age, which means never losing your enthusiasm.

If you paint in your mind a picture of bright and happy expectations, you put yourself into a condition conducive to your goal.

To give real service, you must add something which cannot be bought or measured with money.

Impossible is a word to be found only in the dictionary of fools.

Whatever you are, be a good one.

Sovereignty is not given, it is taken.

My advice to other disabled people would be, concentrate on things your disability doesn't prevent you doing well, and don't regret the things it interferes with. Don't be disabled in spirit as well as physically.

To give pleasure to a single heart by a single act is better than a thousand heads bowing in prayer.

People throw stones at you and you convert them into milestones.

If the only tool you have is a hammer, you tend to see every problem as a nail.

Go on with what your heart tells you, or you will lose all.

This is one small step for a man, one giant leap for mankind.

Isn't it astonishing that all these secrets have been preserved for so many years just so we could discover them!

United we stand; divided we fall.

The secret to creativity is knowing how to hide your sources.

I wouldn't say I was the best manager in the business. But I was in the top one.