and have no fellowship with the unfruitful works of darkness, but rather even reprove them;
These vile lusts were rife among pagans and must be cut out by the roots. Do not name them as though they were acceptable; hate them utterly as befit the saints. Guard even against foolish talking and jesting that cheapen what is holy.
AI summary
Commenting on Ephesians 5:3-20
unfruitful works of darkness--Sins are terminated in themselves, and therefore are called "works," not "fruits" (Gal 5:19, Gal 5:22). Their only fruit is that which is not in a true sense fruit (Deu 32:32), namely, "death" (Rom 6:21; Gal 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).
And have no fellowship with the unfruitful works of darkness, but rather reprove [them]. (e) Make them open to all the world, by your good life.