"I do not think you can name many great inventions that have been made by married men."

"Man must exercise temperance and control of his senses and leanings in every way, thus keeping himself young in body and mind."

"The spread of civilization may be likened to a fire; first, a feeble spark, then a flickering flame, then a mighty conflagration, fiercely glowing and devouring."

"I don't care that they stole my idea . . I care that they don't have any of their own."

"I do not marry, for I consider that for an inventor, marriage is a great obstacle."