Our elders admirably describe the nature of this malady as like that of an onion, and of those bulbs which when stripped of one covering you find to be sheathed in another; and as often as you strip them, you find them still protected.
Reproduced in full. Translation: Nicene and Post-Nicene Fathers, series 2, vol. 11 (Schaff and Wace, 1894), public domain (Public domain).