Progress results only from the fact that there are some men and women who refuse to believe that what they know to be right cannot be done.
The Wright brothers flew through the smoke screen of impossibility.
Most of the basic truths of life sound absurd at first hearing.
The good thing about being young is that you are not experienced enough to know you cannot possibly do the things you are doing.
The young do not know enough to be prudent, and therefore they attempt the impossible-and achieve it, generation after generation.
Sometimes it proves the highest understanding not to understand.
Aerodynamically, the bumblebee shouldn't be able to fly, but the bumble bee doesn't know it so it goes on flying anyway.
Lack of understanding is a great power. Sometimes it enables men to conquer the world.
An impossibility does not disturb us until its accomplishment shows what fools we were.
Once you start asking questions, innocence is gone.
God may have been waiting for centuries for somebody ignorant enough of the impossible to do that thing.
To some people, the impossible is impossible.
Some of my best friends are illusions. Been sustaining me for years.
Great things are accomplished by those who do not feel the impotence of man. This ... is a precious gift.
At first people refuse to believe that a strange new thing can be done, then they begin to hope it can be done, then they see it can be done-then it is done and all the world wonders why it was not done centuries ago.
Ordinary people believe only in the possible. Extraordinary people visualize not what is possible or probable, but rather what is impossible. And by visualizing the impossible, they begin to see it as possible.
Success is often achieved by those who don't know that failure is inevitable.
It is our duty as men and women to proceed as though limits to our abilities do not exist.
So long as we think dugout canoes are the only possibility-all that is real or can be real-we will never see the ship, we will never feel the free wind blow.
Men are always averse to enterprises in which they foresee difficulties.
