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

"You may live to see man-made horrors beyond your comprehension."

"My brain is only a receiver, in the Universe there is a core from which we obtain knowledge, strength, and inspiration."

"I have toiled ceaselessly for a quarter of a century for the love of science, to benefit humanity."

"I have not married, so that I may devote myself entirely to my work."