Never stand begging for what one has the power to earn.

Know thyself.

Don't fear failure. Not failure, but low aim, is the crime. In great attempts it is glorious even to fail.

I am the lizard king. I can do anything.

You'll never do a whole lot unless you're brave enough to try.

Yesterday is gone. Tomorrow has not yet come. We have only today. Let us begin.

I can never stand still. I must explore and experiment. I am never satisfied with my work. I resent the limitations of my own imagination.

A sudden dart when a little over a hundred feet from the end of the track, or a little over 120 feet from the point at which it rose into the air, ended the flight.

As long as I'm in great shape, nobody beats me, for sure.

Whatever you do will be insignificant, but it is very important that you do it.

A man is but the product of his thoughts. What he thinks, he becomes.

The desire to reach for the stars is ambitious. The desire to reach hearts is wise.

You are never too old to become younger!

Plan your work - work your plan. Lack of system produces that 'I'm swamped' feeling.

When I go, God's going to have to give up his favourite chair.

I don't care what people think or say about me, I know who I am.

Courage is the most important of all the virtues, because without courage you can't practice any other virtue consistently. You can practice any virtue erratically, but nothing consistently without courage.

The unexamined life is not worth living.

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

When you arise in the morning think of what a privilege it is to be alive, to think, to enjoy, to love ...

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