Letter 168

Isidore of PelusiumUnknown|isidore pelusium
From: Isidore of Pelusium, monk at Pelusium
To: Paul
Date: ~410 AD
Context: Isidore argues that those who hold correct doctrine must also live correctly — otherwise they hand their opponents the very weapon they need.

On the necessity that those who shine with the correctness of their teaching must also have a life that matches their words.

If we defeat heretics, pagans, and Jews through the correctness of our doctrine, we ought equally to defeat them in our conduct — so that those who have rejected the faith cannot point at our lives and say: "Those who fail so visibly in the obvious things — how can you trust their judgment on hidden ones?"

Piety is primary and most essential. But piety without the conduct that attests it is a title without the office it implies. The strongest argument for right doctrine is right living. The strongest argument against it is the life of those who profess it while practicing its opposite.

We must not give our opponents that argument. They will use it.

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