De Principiis

⁴ They again recall us, however, to the words of Scripture, by bringing forward that celebrated question of theirs, affirming that it is written, “A bad tree cannot produce good fruits; for a tree is known by its fruit.” What, then, is their position? What sort of tree the law is, is shown by its fruits, i.e., by the language of its precepts. For if the law be found to be good, then undoubtedly He who gave it is believed to be a good God. But if it be just rather than good, then God also will be considered a just legislator.

The Apostle Paul makes use of no circumlocution, when he says, “The law is good; and the commandment is holy, and just, and good.” From which it is clear that Paul had not learned the language of those who separate justice from goodness, but had been instructed by that God, and illuminated by His Spirit, who is at the same time both holy, and good, and just; and speaking by whose Spirit he declared that the commandment of the law was holy, and just, and good. And that he might show more clearly that goodness was in the commandment to a greater degree than justice and holiness, repeating his words, he used, instead of these three epithets, that of goodness alone, saying, “Was then that which is good made death unto me?

God forbid.” As he knew that goodness was the genus of the virtues, and that justice and holiness were species belonging to the genus, and having in the former verses named genus and species together, he fell back, when repeating his words, on the genus alone. But in those which follow he says, “Sin wrought death in me by that which is good,” where he sums up generically what he had beforehand explained specifically. And in this way also is to be understood the declaration, “A good man, out of the good treasure of his heart, brings forth good things; and an evil man, out of the evil treasure, brings forth evil things.” For here also he assumed that there was a genus in good or evil, pointing out unquestionably that in a good man there were both justice, and temperance, and prudence, and piety, and everything that can be either called or understood to be good.

In like manner also he said that a man was wicked who should without any doubt be unjust, and impure, and unholy, and everything which singly makes a bad man. For as no one considers a man to be wicked without these marks of wickedness (nor indeed can he be so), so also it is certain that without these virtues no one will be deemed to be good. There still remains to them, however, that saying of the Lord in the Gospel, which they think is given them in a special manner as a shield, viz., “There is none good but one, God the Father.” This word they declare is peculiar to the Father of Christ, who, however, is different from the God who is Creator of all things, to which Creator he gave no appellation of goodness.

Let us see now if, in the Old Testament, the God of the prophets and the Creator and Legislator of the word is not called good. What are the expressions which occur in the Psalms? “How good is God to Israel, to the upright in heart!” and, “Let Israel now say that He is good, that His mercy endures for ever;” the language in the Lamentations of Jeremiah, “The Lord is good to them that wait for Him, to the soul that seeks Him.” As therefore God is frequently called good in the Old Testament, so also the Father of our Lord Jesus Christ is styled just in the Gospels.

Finally, in the Gospel according to John, our Lord Himself, when praying to the Father, says, “O just Father, the world has not known You.” And lest perhaps they should say that it was owing to His having assumed human flesh that He called the Creator of the world “Father,” and styled Him “Just,” they are excluded from such a refuge by the words that immediately follow, “The world has not known You.” But, according to them, the world is ignorant of the good God alone. For the world unquestionably recognises its Creator, the Lord Himself saying that the world loves what is its own.

Clearly, then, He whom they consider to be the good God, is called just in the Gospels. Any one may at leisure gather together a greater number of proofs, consisting of those passages, where in the New Testament the Father of our Lord Jesus Christ is called just, and in the Old also, where the Creator of heaven and earth is called good; so that the heretics, being convicted by numerous testimonies, may perhaps some time be put to the blush.