Letter 38

Isidore of PelusiumUnknown|isidore pelusium
From: Isidore of Pelusium, monk
To: An inquirer
Date: ~410 AD
Context: Isidore explains the connection between Esau's gluttony and immorality.

Knowing full well that indulgence breeds passions and gluttony drags a person toward sexual immorality, I think you asked a superfluous question about the verse, "Lest anyone be a fornicator or profane person, like Esau" [Hebrews 12:16]. The explanation is straightforward. Scripture showed that Esau was a glutton — he sold his birthright for a bowl of stew — and that was enough to prove him both immoral and profane. The belly is the gateway to every other vice. Master your appetite, and you have mastered half the battle. Lose control of it, and everything else follows into ruin.

Modern English rendering for readability. See the 19th-century translation or original Latin/Greek for scholarly use.