Richard Chenevix Trench,
A select glossary of English words used formerly in senses different from their present
(1890)
“ I may truly say of the mind of an ungrateful person, that it is kindness-proof. It is inpenetrable, unconquerable; unconquerable by that which conquers all things else, even by love itself. And the reason is manifest; for you may remember that I told you that ingratitude sprang from a principle of ill-nature; which being a thing founded in such a certain constitution of blood and spirit, as being born with a man into the world, and upon that account called nature, shall prevent all remedies that can be applied by education.—South, Sermons, 1737, vol. ”
