Ephesians 5:13

But all things that are reproved are made manifest by the light. — This should properly be rendered, But all things, when reproved, are illuminated by the light. The translation “are made manifest” is indeed fully in accordance with the common usage of the word. But the whole context shows that St. Paul is here using it in what is indeed its more proper etymological sense, for “are illumined.” For the mere “being made manifest” is implied in the “being reproved;” whereas he is certainly passing on here to a fresh idea, and, moreover, to one which will bear the inference of the last clause of the verse. To “reprove” after the Christian manner is to bring into the full light of Christ’s truth; and the effect of this is not merely to reprove, but to illumine by the inherent power of the light. Exactly with the same distinction of sense St. John uses both words (John 3:20).

For whatsoever doth make manifest is light. — That this translation (suggested, perhaps, by the difficulty of the passage when rightly rendered) is nevertheless certainly wrong, is shown both by the usage of the original word and by the genius of the whole context. It should be, for everything which is illuminated is light. St. Paul here explains still more clearly what he means by illumination. It implies the catching the light and reflecting it, so as to become a new source of light. It must be noted that the subject of the sentence is not “the works of darkness,” but “all things” in general. Hence the whole process is described, with almost scientific accuracy, as three-fold. First, the things, or persons, are dragged out of darkness into light; then they are illuminated; lastly, they become light in themselves and to others. There are, no doubt, exceptions to this, the right and normal process, in the case of the utterly reprobate, who have lost all power of reflecting light, and are therefore dark still in the blaze of noon; but the next verse shows that St. Paul is not contemplating these; and even these may be beacons of warning to others. The whole metaphor is more and more striking to us as modern science enlarges our knowledge of the manifold effects of light, not only to illuminate, but to change and to vivify.