Thomas Aquinas, the greatest Christian theologian of the medieval era, looked at the four cardinal virtues of Plato—justice, courage, temperance, and prudence—and agreed that these were also taught in the Christian Scriptures.191 Then Aquinas added three theological virtues—faith, hope, and love—to the four cardinal virtues, because these are specifically and uniquely born out of the Christian revelation about the character of God and his grace.
