I expect to spend the rest of my life in the future, so I want to be reasonably sure of what kind of future it's going to be. That is my reason for planning.

An inventor fails 999 times, and if he succeeds once, he's in. He treats his failures simply as practice shots.

It is not a disgrace to fail. Failing is one of the greatest arts in the world.

Whenever you look at a piece of work and you think the fellow was crazy, then you want to pay some attention to that. One of you is likely to be, and you had better find out which one it is. It makes an awful lot of difference.

Every father should remember one day his son will follow his example, not his advice.

A man must have a certain amount of intelligent ignorance to get anywhere.

Don't be afraid to stumble. Any inventor will tell you that you don't follow a plan far before you strike a snag. If, out of 100 ideas you get one that works, it's enough.