Ephesians 5:9
9. fruit of the Spirit—taken by transcribers from Ga 5:22. The true reading is that of the oldest manuscripts, "The fruit of THE LIGHT"; in contrast with "the unfruitful works of darkness" (Eph 5:11). This verse is parenthetic. Walk as children of light, that is, in all good works and words, "FOR the fruit of the light is [borne] in [ALFORD; but BENGEL, 'consists in'] all goodness [opposed to 'malice,' Eph 4:31], righteousness [opposed to 'covetousness,' Eph 5:3] and truth [opposed to 'lying,' Eph 4:25]."
Ephesians 5:11
11. unfruitful works of darkness—Sins are terminated in themselves, and therefore are called "works," not "fruits" (Ga 5:19, 22). Their only fruit is that which is not in a true sense fruit (De 32:32), namely, "death" (Ro 6:21; Ga 6:8). Plants cannot bear "fruit" in the absence of light. Sin is "darkness," and its parent is the prince of darkness (Eph 6:12). Graces, on the other hand, as flourishing in "the light," are reproductive, and abound in fruits; which, as harmoniously combining in one whole, are termed (in the singular) "the FRUIT of the Spirit" (Eph 5:9).
rather, &c.—Translate as Greek, "rather even reprove them" (compare Mt 5:14-16). Not only "have no fellowship, but even reprove them," namely, in words, and in your deeds, which, shining with "the light," virtually reprove all that is contrary to light (Eph 5:13; Joh 3:19-21). "Have no fellowship," does not imply that we can avoid all intercourse (1Co 5:10), but "avoid such fellowship as will defile yourselves"; just as light, though it touch filth, is not soiled by it; nay, as light detects it, so, "even reprove sin."