Saint Chrysostom says: “Here he explains what it means to walk as children of light, and says: in all goodness, against the angry and harsh; and righteousness, against the covetous; and truth, against false pleasure.”
Thus, according to Saint Chrysostom, followed by Oecumenius and Theophylact, goodness, righteousness, and truth dwell in us by the grace of the Holy Spirit and drive out all the passions.
Or they dwell in us on the condition that the passions, about which the Apostle has written until now, have been driven out. Once established, they begin to act in place of them. For they are active powers, not passive qualities.
If goodness, righteousness, and truth are established where the passions have been banished, then clearly the state of dispassion and purity is defined by them.
What goodness, righteousness, and truth mean exactly may be explained differently from our commentators. Yet one cannot reinterpret the fact that they are implanted in place of the passions and themselves embrace the whole bright, Godlike life.
The meaning of each of these root virtues is clear from its very name. Goodness embraces all love. Righteousness embraces every righteousness, permitting nothing unrighteous, not only in deed and word, but even in thought.
Love and righteousness are the clearest representatives of likeness to God, for God is love and righteousness itself. What does truth signify?
Since one cannot live rightly and lovingly without knowledge of the truth, this may be understood as knowledge of truth. This knowledge is grace-filled. It illumines all the paths of life.
It indicates what must be done, and how, in each circumstance, so that one may act in a way pleasing to God.
Yet there is nothing unfitting in accepting, together with Saint Chrysostom, that here he points to the taste of the true good in the Lord, in contrast to deceptive sensual pleasures.
Those who commune with the Lord taste that the Lord is good, and they are assured that only in this tasting is their true good. This assurance, with constant tasting of the good things from the Lord, becomes the true and firm support of spiritual life.
It does not allow one to notice the privations connected with that life. Like a stream, sweet and true good flows into the heart from life according to God, when one tastes how good the Lord is.
If one enters into details about what goodness, righteousness, and truth are, one may build an entire system of Christian moral teaching. One may present the full bright image of the life of the sons of light.
Whoever desires may be guided in this by what the Longer Catechism and the Orthodox Confession say in explanation of the Beatitudes: blessed are those who hunger and thirst for righteousness; blessed are the merciful; and blessed are the pure in heart.
But it seems that the holy Apostle wished to embrace all this in one word when he says next.