You're going to find this hard to believe, but I don't give a damn about the money," answered Flint. "'Hard' is an understatement," said Mr. Ahasueru… - Mike Resnick

I also destroyed a man who was in serious need of destruction," replied Cain. "On the whole, I'd say the ledger came out on the plus side."
"There wasn't even any paper on Socrates."
"Then view killing him as a service to humanity."
"I wasn't aware that you were in the philanthropy business," said the Swagman.
"There are more important things than money," said Cain.
"True—but all of them cost money.

Have you ever done anything, even once, with no thought of a return?" he asked.
"Yes."
"How old were you? Six?"
"Younger. And I immediately decided that there was no percentage in it.

“Did you not ever want to see what was beyond the next hill, what strange and unique civilizations lay beyond your own?”
“Until I got there,” answered Monk.