If you can't you must, and if you must you can.

My heroes are the ones who survived doing it wrong, who made mistakes, but recovered from them.

When you believe in a thing, believe in it all the way, implicitly and unquestionably.

Gratitude is an illness suffered by dogs.

Courage is the thing. All goes if courage goes.

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

I'm sorry I wrote you such a long letter; I didn't have time to write a short one.

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

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

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

Somewhere, something incredible is waiting to be known.

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

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

Duty does not require any person to submit to the destruction of his personal ambitions and the right to live his own life in his own way.

Repetition of the same thought or physical action develops into a habit which, repeated frequently enough, becomes an automatic reflex.

What's the world's greatest lie?... It's this: that at a certain point in our lives, we lose control of what's happening to us, and our lives become controlled by fate.

The superior man thinks only of virtue; the common man thinks only of comfort.

If we ever forget that we're one nation under God, then we will be one nation gone under.

To attain the impossible, one must attempt the absurd.

Stop acting so small. You are the universe in ecstatic motion.

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