“I endorse all that you say of the superior intelligence of the felidae. Never have I been able to associate the docile servility and satellitism of the canidae with mental power. Zoölogists seem to consider the cerebration of cats and dogs about 50-50—but my respect always goes to the cool, sure, impersonal, delicately poised feline who minds his business and never slobbers—the aristocratic, epicurean philosopher who knows what he wants and tells interlopers to go to hell. There is no credit in having a dog attached to one—for a dog can be conditioned to become anybody's slave and property. But a cat is nobody's slave. You do not own a cat. If one lives in your home, it is because he regards your way of life favourably, and accepts you as a friend, as one gentleman accepts another. He takes no kicks or insolence from anyone. If you are not worthy to associate with him, he will depart to seek an environment more suited to a gentleman's taste. Therefore he who retains the respect and companionship of a feline has proven himself to be essentially a superior citizen. For a human being, membership in the Kappa Alpha Tau forms a badge of distinction. Many are the eminent names on that member ship list—Mahomet himself, Richelieu, Poe, Baudelaire... one could catalogue them endlessly. Certainly, I ask no greater honour than to be accounted a citizen of Ulthar beyond the River Skai!”

Letter to E. Hoffmann Price (29 July 1936), published in Selected Letters Vol. V, p. 290
Non-Fiction, Letters, to E. Hoffmann Price