The man who doesn’t make up his mind to cultivate the habit of thinking misses the greatest pleasure in life.

Invention is 1% inspiration and 99% perspiration

Genius is one percent inspiration and ninety-nine percent perspiration. As a result, a genius is often a talented person who has simply done all of his homework.

Nearly every man who develops an idea works it up to the point where it looks impossible, and then he gets discouraged. That's not the place to become discouraged.

I am long on ideas, but short on time. I expect to live to be only about a hundred.

The very first thing an executive must have is a fine memory. Of course it does not follow that a man with a fine memory is necessarily a fine executive. But if he has the memory he has the first qualification, and if he has not the memory nothing else matters.

Of the 200 light bulbs that didn't work, every failure told me something that I was able to incorporate into the next attempt.