A quote
It is not in my purpose to show, by this array of examples, how much time I have wasted on the study of language; I merely wish you to understand how many words, that were current in the works of Ennius and Accius, have become mouldy with age; while even in the case of Vergil, whose works are explored daily, some of his words have been filched away from us.
Seneca·Letter 58 — On Being (§5)·trans. Gummere