“A good novel tells us the truth about its hero; but a bad novel tells us the truth about its author”

“Humanity needs practical men, who get the most out of their work, and, without forgetting the general good, safeguard their own interests. But humanity also needs dreamers, for whom the disinterested development of an enterprise is so captivating that it becomes impossible for them to devote their care to their own material profit.”

“In science, we must be interested in things, not in persons”

“A scientific man ought to have no wishes, no affections, - a mere heart of stone”

“People who lead a lonely existence always have something on their minds that they are eager to talk about”

“No calculations of interest, no schemes of policy can do the work of love, of the spirit of human brotherhood. There can be no peace without but through peace within.”