John Cassian, Conferences I–X X.1: Introduction

Among the sublime customs of the anchorites which by God’s help have been set forth although in plain and unadorned style, the course of our narration compels us to insert and find a place for something, which may seem so to speak to cause a blemish on a fair body: although I have no doubt that by it no small instruction on the image of Almighty God of which we read in Genesis will be conferred on some of the simpler sort, especially when the grounds are considered of a doctrine so important that men cannot be ignorant of it without terrible blasphemy and serious harm to the Catholic faith.