Speech, like laughter, measures the soul. Clement of Alexandria commands believers to silence filthy talk, for what leaves the lips can either sanctify or defile (Matthew 12:37). Jerome writes to Augustine from Bethlehem, defending his Hebrew translations and declaring that truth must never yield to custom—a defense of fidelity to the Word itself (John 17:17). Thomas Aquinas completes the triad by teaching that reason must temper anger; another’s defect should awaken mercy more than wrath (Psalm 103:13–14). Together these readings teach restraint of tongue, patience in dispute, and compassion over judgment—the virtues that make truth credible.

Readings:

Clement of Alexandria, The Instructor, Book 2, Chapter 6

Jerome, Letter 75 to Augustine

Thomas Aquinas, Summa Theologica, Part 2–2, Question 47,  ...