One of the things I learned when I was negotiating was that until I changed myself, I could not change others.

Whatever the mind of man can conceive and believe, it can achieve.

Happiness depends more on the inward disposition of mind than on outward circumstances.

Go then if you must, but remember, no matter how foolish your deeds, those who love you will love you still.

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

I not only use all the brains that I have, but all that I can borrow.

They deem me mad because I will not sell my days for gold; and I deem them mad because they think my days have a price.

Be more concerned with your character than your reputation, because your character is what you really are, while your reputation is merely what others think you are.

Imagination is everything. It is the preview of life's coming attractions.

I am always doing that which I can not do, in order that I may learn how to do it.

Work gives you meaning and purpose and life is empty without it.

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

Every nation has the right to demand proper treatment and no country should violate the territory of any other country.

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

Imperfection is beauty, madness is genius and it's better to be absolutely ridiculous than absolutely boring.

I am as bad as the worst, but, thank God, I am as good as the best.

The marble not yet carved can hold the form of every thought the greatest artist has.

You're never as good as everyone tells you when you win, and you're never as bad as they say when you lose.

The great art of life is sensation, to feel that we exist, even in pain.

I work hard, and I do good, and I'm going to enjoy myself. I'm not going to let you restrict me.

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