CCC 2469

"Men could not live with one another if there were not mutual confidence that they were being truthful to one another."²⁶² St. Thomas Aquinas, STh II-II 109, 3 ad 1. The virtue of truth gives another his just due. Truthfulness keeps to the just mean between what ought to be expressed and what ought to be kept secret: it entails honesty and discretion. In justice, "as a matter of honor, one man owes it to another to manifest the truth."²⁶³ St. Thomas Aquinas, STh II-II, 109, 3, corp. art.