Our lives begin to end the day we become silent about things that matter.

If you can accept losing, you can't win.

No leader can be too far ahead of his followers.

You must never be fearful about what you are doing when it is right.

Change the way you look at things and the things you look at change.

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.

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

Imagination will often carry us to worlds that never were, but without it we go nowhere.

I'd rather be an optimist and a fool than a pessimist and right.

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

The crisis of today is the joke of tomorrow.

Whatever you are, be a good one.

Do not go where the path may lead, go instead where there is no path and leave a trail.

There is no greater agony than bearing an untold story inside you.

Be the change that you wish to see in the world.

Once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return.

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

March on. Do not tarry. To go forward is to move toward perfection. March on, and fear not the thorns, or the sharp stones on life's path.

The great secret of true success, of true happiness, is this: the man or woman who asks for no return, the perfectly unselfish person, is the most successful.

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.