Perseverance is failing 19 times and succeeding the 20th.

The key to immortality is first living a life worth remembering.

Every problem has in it the seeds of its own solution. If you don't have any problems, you don't get any seeds.

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.

To go too far is as bad as to fall short.

I don't think necessity is the mother of invention. Invention ... arises directly from idleness, possibly also from laziness. To save oneself trouble.

One of the things I learned when I was negotiating was that until I changed myself, I could not change others.

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

Great work requires great and persistent effort for a long time. … Character has to be established through a thousand stumbles.

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

Everything I've ever done was out of fear of being mediocre.

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

Lend yourself to others, but give yourself to yourself.

We travel. Some of us forever. To seek other states, other lives, other souls.

It's what you learn after you know it all that counts.

What lies behind us and what lies before us are tiny matters compared to what lies within us.

A superior man is modest in his speech, but exceeds in his actions.

When I'm inspired, I get excited because I can't wait to see what I'll come up with next.

First ask yourself: What is the worst that can happen? Then prepare to accept it. Then proceed to improve on the worst.

I am the captain of my soul.

If you can't fly then run, if you can't run then walk, if you can't walk then crawl, but whatever you do you have to keep moving forward.