To my knowledge I was the first guy really to do what I do. And then later on different comedians started trying doing it.

With all the knowledge and skill acquired in thousands of flights in the last ten years I would hardly think today of making my first flight on a strange machine in a twenty-seven mile wind even if I knew that the machine had already been flown and was safe.

The shortest and surest way of arriving at real knowledge is to unlearn the lessons we have been taught to mount the first principles and take nobody's word about them.

I wish I had known more firsthand about the concerns and problems of American businesspeople while I was a U.S. senator and later a presidential nominee. That knowledge would have made me a better legislator and a more worthy aspirant to the White House.

It is becoming clear that the old platitudes can no longer be maintained and that if we wish to improve our morals we must first improve our knowledge.

In formal logic a contradiction is the signal of defeat but in the evolution of real knowledge it marks the first step in progress toward a victory.

When a doctor does go wrong he is the first of criminals. He has nerve and he has knowledge.

The improvement of understanding is for two ends: first our own increase of knowledge secondly to enable us to deliver that knowledge to others.

The first step in a person's salvation is knowledge of their sin.

We did it Disneyland in the knowledge that most of the people I talked to thought it would be a financial disaster - closed and forgotten within the first year.