Noel M. Loomis, Mr. Zytztz goes to Mars (1948)
“ One summer the Phoebus was making a trajectory shot over the Sun when Healey spoke to the Old Man about the Zytztzes."There is no doubt in my mind that they are human," he said. "A human being has to have a soul, doesn't it?"The Old Man looked at him sharply. "That is not the same definition you offered a few years back."Healey blushed. "No, sir. I was wrong, and I'm sorry. They have souls, all right. Any kind of creature that loves the ether as the Martians do—he simply has to have a soul." ”
