Gregory the Dialogist

If I say, I will never speak thus; I change my countenance, and am tormented with grief. For the Jewish People would not speak as before, in that it denied Him, Whom it had foretold; but with changed countenance it is tormented with grief, in that while it defiled with the foulness of unbelief the aspect of its inward man, by which it might have been known by the Creator, setting out with present evils, it brought itself under the sentence of everlasting vengeance. …

Morals on the Book of Job, Book IX ↗

Thomas Aquinas

Because his adversaries thought he was presumptuous as in these words he had implied that he was just and innocent, he begins to confer with God about his innocence for God alone can judge the conscience. So he continues, "If I say," in my heart, "I will speak so to no avail," claiming that I am just and innocent, "I alter my countenance entirely," from the assurance which I began to feel about my innocence to the anxiety in searching for my sins, "and I writhe with pain," reflecting in examining my conscience, that perhaps I will …

Commentary on Job ↗