After climbing a great hill, one only finds that there are many more hills to climb.

Do not worry about holding high position; worry rather about playing your proper role.

The biggest adventure you can ever take is to live the life of your dreams.

A man may die, nations may rise and fall, but an idea lives on.

No great discovery was ever made without a bold guess.

A thing worth having is a thing worth cheating for.

I'm sorry I wrote you such a long letter; I didn't have time to write a short one.

I may have had a lot of luck in my life, but I still need to find a challenge in the game.

I discover myself on the verge of a usual mistake.

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.

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

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

If the little bit you have is nothing special in itself, at least find a way of saying it that is a little bit special.

Courage isn't having the strength to go on - it is going on when you don't have strength.

Be not ashamed women, ... You are the gates of the body, and you are the gates of the soul.

My dear friend, clear your mind of cant.

What I stand for is what I stand on.

If you are humble nothing will touch you, neither praise nor disgrace, because you know what you are.

I'm not telling you it's going to be easy - I'm telling you it's going to be worth it.

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

If the only tool you have is a hammer, you tend to see every problem as a nail.