Ideas without execution are hallucinations.

We shall have no better conditions in the future if we are satisfied with all those which we have at present.

Discontent is the first necessity of progress.

Nature made us - nature did it all - not the gods of the religions.

The first requisite for success is to develop the ability to focus.

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.

Today, I am wondering what would have happened to me by now, if, fifty years ago, some fluent talker had converted me to the theory of the eight-hour day and convinced me that it was not fair to my fellow-workers to put forth my best efforts in my work? I am glad that the eight-hour day had not been invented when I was a young man. If my life had been made up of eight-hour days, I don't believe I could have accomplished a great deal.