It's always too early to quit.

It's kind of fun to do the impossible.

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

After all is said and done, more is said than done.

Though the road's been rocky it sure feels good to me.

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

I do not want to die rusting, I prefer to burn out.

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

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

You'll never get ahead of anyone as long as you try to get even with him.

I will take fate by the throat; it will never bend me completely to its will.

Climbing to the top demands strength, whether it is to the top of Mount Everest or to the top of your career.

We could all take a lesson from crayons: some are sharp, some are beautiful, some have weird names, and all are different colors, but they still learn to live in the same box...

Whenever a negative thought concerning your personal power comes to mind, deliberately voice a positive thought to cancel it out.

Wealth is not about having a lot of money; it's about having a lot of options.

I am the captain of my soul.

It is greed to do all the talking but not to want to listen at all.

When obstacles arise, you change your direction to reach your goal; you do not change your decision to get there.

I confess that in 1901 I said to my brother Orville that man would not fly for fifty years.

We do not consider our principles as dogmas contained in books said to come from heaven. We derive our inspiration, not from heaven, or the unseen world, but directly from life.

We are all in the gutter, but some of us are looking at the stars.