Gullivers Travels by Part 4 Chapter 12 Page 16

thing that is evil, except those whereby they describe the detestable qualities of their Yahoos, among which they were not able to distinguish this of pride, for want of thoroughly understanding human nature, as it shows itself in other countries where that animal presides. But I, who had more experience, could plainly observe some rudiments of it among the wild Yahoos.

But the Houyhnhnms, who live under the government of reason, are no more proud of the good qualities they possess, than I should be for not wanting a leg or an arm; which no man in his wits would boast of, although he must be miserable without them. I dwell the longer upon this subject from the desire I have to make the society of an English Yahoo by any means not insupportable; and therefore I here entreat those who have any tincture of this absurd vice,