by Edward Elmer Smith and Edward Everett Evans, Masters of Space — Chapter III (1962)
“ The Omans flinched; the humans gasped.“But more of that later,” Hilton went on, unmoved. “Your ancient Masters, being short-lived like us, changed materially with time, did they not? And you changed with them?”“But we did not change ourselves, Master. The Masters ...”“You did change yourselves. The Masters changed only the prototype brain. They ordered you to change yourselves and you obeyed their orders. We order you to change and you refuse to obey our orders. We have changed greatly from our ancestors. Right?” ”
