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

Without ambition one starts nothing. Without work one finishes nothing. The prize will not be sent to you. You have to win it.

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

Look up at the stars and not down at your feet. Try to make sense of what you see, and wonder about what makes the universe exist. Be curious.

Defeat is not defeat unless accepted as a reality-in your own mind.

The more you lose yourself in something bigger than yourself, the more energy you will have.

Do you want to know who you are? Don't ask. Act! Action will delineate and define you.

Do not pray for easy lives. Pray to be stronger men.

Become a possibilitarian. No matter how dark things seem to be or actually are, raise your sights and see possibilities -- always see them, for they're always there.

I'm not telling you it's going to be easy - I'm telling you it's going to be worth it.

Do not worry about holding high position; worry rather about playing your proper role.

The starting point of all achievement is desire.

Your pain is the breaking of the shell that encloses your understanding.

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.

You say I started out with practically nothing, but that isn't correct. We all start with all there is, it's how we use it that makes things possible.

My optimism wears heavy boots and is loud.

If you spend too much time thinking about a thing, you'll never get it done.

If you are humble nothing will touch you, neither praise nor disgrace, because you know what you are.

We should not give up and we should not allow the problem to defeat us.

Life is entrusted to man as a treasure which must not be squandered, as a talent which must be used well.

Memories of our lives, of our works and our deeds will continue in others.