² tn The problem of the present tense of ποιεῖ (poiei) here is exactly that of the present tense of ἁμαρτάνει (Jamartanei) in 3:6. Here in 3:9 the distinction is sharply drawn between “the one who practices sin” in 3:8, who is of the devil, and “the one who is fathered by God” in 3:9, who “does not practice sin.” See S. Kubo (“I John 3:9: Absolute or Habitual?” AUSS 7 [1969]: 47-56) for a fuller discussion of the author’s argument as based on a sharp antithesis between the recipients (true Christians) and the opponents (heretics).

² sn Does not sin. It is best to view the distinction between “everyone who practices sin” in 3:4 and “everyone who resides in him” in 3:6 as absolute and sharply in contrast. The author is here making a clear distinction between the opponents, who as moral indifferentists downplay the significance of sin in the life of the Christian, and the readers, who as true Christians recognize the significance of sin because Jesus came to take it away (3:5) and to destroy it as a work of the devil (3:8). This argument is developed more fully by S. Kubo (“I John 3:9: Absolute or Habitual?” AUSS 7 [1969]: 47-56), who takes the opponents as Gnostics who define sin as ignorance. The opponents were probably not adherents of fully developed gnosticism, but Kubo is right that the distinction between their position and that of the true Christian is intentionally portrayed by the author here as a sharp antithesis. This explanation still has to deal with the contradiction between 2:1-2 and 3:6-9, but this does not present an insuperable difficulty. The author of 1 John has repeatedly demonstrated a tendency to present his ideas antithetically, in “either/or” terms, in order to bring out for the readers the drastic contrast between themselves as true believers and the opponents as false believers. In 2:1-2 the author can acknowledge the possibility that a true Christian might on occasion sin, because in this context he wishes to reassure his readers that the statements he has made about the opponents in the preceding context do not apply to them. But in 3:4-10, his concern is to bring out the absolute difference between the opponents and his readers, so he speaks in theoretical rather than practical terms which do not discuss the possible occasional exception, because to do so would weaken his argument.