"I have always been a great believer in luck, and I find that the harder I work, the more I have of it."

"The inventor... looks upon the world and is not contented with things as they are. He wants to improve whatever he sees, he wants to benefit the world; he is haunted by an idea. The spirit of inventio…"

"The true inventor is not the one who first conceives an idea, but the one who brings it to fruition."

"Don't keep forever on the public road, going only where others have gone. Leave the beaten track occasionally and dive into the woods. Every time you do so you will be certain to find something that y…"

"I have never seen the slightest scientific proof of the religious theories of the creation of the world, and I do not believe any such proof will be found."