"The present is theirs; the future, for which I really worked, is mine."
"I do not think you can name many great inventions that have been made by married men."
"The scientist does not believe in faith; he believes in facts."
"To know each other we must reach beyond the sphere of our own knowledge."
"The electric motor is the greatest invention of all time."
"Our virtues and our failings are inseparable, like force and matter."
"I am not a man of science, but rather a man of ideas."