People don't realize how a man's whole life can be changed by one book.

The duty of youth is to challenge corruption.

Others have seen what is and asked why. I have seen what could be and asked why not.

Fantasy is an exercise bicycle for the mind. It might not take you anywhere, but it tones up the muscles that can. Of course, I could be wrong.

You can't build a reputation on what you are going to do.

Always remember you are braver than you believe, stronger than you seem, smarter than you think and twice as beautiful as you’ve ever imagined.

Years from now, after I'm gone, someone will listen to what I've done and know I was here. They may not know or care who I was, but they'll hear my guitars speaking for me.

I don’t think we are going to become extinct. We are very clever and very resourceful.

A man can't soar too high, when he flies with his own wings.

Cultivate your curves - they may be dangerous but they won't be avoided.

Freedom from the desire for an answer is essential to the understanding of a problem.

Never look back unless you are planning to go that way.

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

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.

Don't wish it were easier, wish you were better.

No one is free who has not obtained the empire of himself. No man is free who cannot command himself.

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

The real man smiles in trouble, gathers strength from distress, and grows brave by reflection.

You can chain me, you can torture me, you can even destroy this body, but you will never imprison my mind.

Don't hit at all if it is honorably possible to avoid hitting; but never hit soft!

Focus on where you want to go, not on what you fear.