JMNT(i)
18 O undeveloped ones or folks of the age to be educated (or: servants, little boys and little girls who might be hit in training and for discipline), it continues being (or: is progressively) a last hour (= an eschaton of the Day, or the closing moment [of the age]), and according as you hear (or: heard) that an antichrist (or: anti-anointing; that which is instead of, or in the place of, Christ or the Anointing) repeatedly comes [other MSS: the anti-anointing (or: antichrist) continuously comes], even now many anti-anointings (or: antichrists; many things or people taking the place of Christ or stand in opposition to the Anointing) have been born and are here (or: have come into existence and are at large), from which fact (or: whence) we constantly know by experience that it continues being a last hour (= a closing moment [of the age]).
19 They came (or: come; go; or: went) out from us, but they were not existing out of us (or: they were not [a part] of us), for if they were out of us, they would have remained (dwelt; abided) with us; but [this was] to the end that they may be manifested (caused to appear) that they are not all out of us or from us.
20 And further, you folks continue having the effects (or: constantly hold and progressively possess the results) of an anointing from the set-apart One (or: the Holy One), and so you all have seen and are aware (or: know; perceive; [other MSS: and you know all {those} folks]).
21 I do not write to you because you do not know the Truth (or: [new] Reality), but rather because you do know it, and because every lie is not forth from the Truth (or: even that all falsehood is not [coming] from Reality).
22 Which one is (exists continuously being) the liar, if not the person habitually denying (repeatedly disowning; = constantly turning his back), [saying] that Jesus is not the Christ (the Anointed One [= Messiah])? This person is (exists being) the anti-anointing (or: anti-anointed person; the one taking the place of and being in the opposite position of the anointing and of Christ): the one habitually denying (constantly turning his back on) the Father and the Son.