Knowing what's right doesn't mean much unless you do what's right.

Live as if you were to die tomorrow. Learn as if you were to live forever.

Nobody can hurt me without my permission.

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

Determine never to be idle. No person will have occasion to complain of the want of time, who never loses any. It is wonderful how much may be done, if we are always doing.

Character isn't something you were born with and can't change, like your fingerprints. It's something you weren't born with and must take responsibility for forming.

The people who were trying to make this world worse are not taking the day off. Why should I?

Our life is what our thoughts make it.

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

Whatever you are, be a good one.

Change your thoughts and you change your world.

If you don't like something, change it. If you can't change it, change your attitude. Don't complain.

I think nature's imagination Is so much greater than man's, she's never going to let us relax.

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

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

I trust that everything happens for a reason, even if we are not wise enough to see it.

A lot of legends, a lot of people, have come before me. But this is my time.

In winter, I plot and plan. In spring, I move.

The limits of the possible can only be defined by going beyond them into the impossible.

Human dignity consists in the role we must play in our own perfection. Taking a role in our own self-completion is the highest expression of our creativity.

He was a dreamer, a thinker, a speculative philosopher... or, as his wife would have it, an idiot.