Self-esteem comes from being able to define the world in your own terms and refusing to abide by the judgments of others.

A jug fills drop by drop.

All human actions have one or more of these seven causes: chance, nature, compulsion, habit, reason, passion, and desire.

An original idea. That can't be too hard. The library must be full of them.

A good liar must have a good memory.

He who would accomplish little must sacrifice little; he who would achieve much must sacrifice much; he who would attain highly must sacrifice greatly.

Hope is like the sun, which, as we journey toward it, casts the shadow of our burden behind us.

The cure for boredom is curiosity.There is no cure for curiosity.

Entrepreneurs are simply those who understand that there is little difference between obstacle and opportunity and are able to turn both to their advantage.

There are books of which the backs and covers are by far the best parts.

We can work together for a better world with men and women of goodwill, those who radiate the intrinsic goodness of humankind.

Give up trying to make me give up

In just six weeks from the time the design was started, we had the motor on the block testing its power.

Usually when people are sad, they don't do anything. They just cry over their condition. But when they get angry, they bring about a change.

No flying machine will ever fly from New York to Paris.

Quote me as saying I was mis-quoted.

I think we're having fun. I think our customers really like our products. And we're always trying to do better.

One of the advantages of being disorderly is that one is constantly making exciting discoveries.

A moral being is one who is capable of reflecting on his past actions and their motives - of approving of some and disapproving of others

The right of a nation to kill a tyrant in case of necessity can no more be doubted than to hang a robber, or kill a flea.

If from Society we learn to live Tis Solitude should teach us how to die; It hath no flatterers.