Upton Sinclair

“ A man must have strong convictions to follow that occupation!
He made the remark, and the other answered, "You can have my pay any time you'll do my work. But let me tell you, too, it isn't being beaten and kicked out of camp that bothers one most; it isn't the camp-marshal and the spy and the blacklist. Your worst troubles are inside the heads of the fellows you're trying to help! Have you ever thought what it would mean to try to explain things to men who speak twenty different languages?"
"Yes, of course," said Hal. "I wonder how you ever get a start." ”

“ And of course these European peoples have their old prejudices--national prejudices, religious prejudices, that keep them apart. You see two fellows, one you think is exactly as miserable as the other--but you find him despising the other, because back home he was the other's superior. ”