The trustworthy, reliable word. Comp. 1Ti 1:15 (note).
As he hath been taught (κατὰ τὴν διδαχὴν)
Lit. according to the teaching. Const. with word. Agreeing with the apostolic teaching. For διδαχή teaching see on 2Ti 4:2.
May be able by sound doctrine both to exhort (δυνατὸς ῇ καὶ παρακαλεῖν ἐν τῇ διδασκαλίᾳ τῇ ὐγιαινούσῃ)
Rend. “may be able both to exhort in the sound teaching.” For δυνατὸς able or powerful, see on 2Ti 1:12. Used by Paul in the phrase εἰ δυνατόν if it be possible, Rom 12:18; Gal 4:15 : τὸ δυνατόν that which is possible, Rom 9:22 : of God, Rom 4:21; Rom 11:23 : of men, in the ethical sense, Rom 15:1; 2Co 12:10; 2Co 13:9.
Convince (ἐλέγχειν)
Better, convict. See on Joh 3:20, and see on ἐλεγμὸν, 2Ti 3:16.
The gainsayers (τοὺς ἀντιλέγοντας)
In Pastorals only here and Tit 2:9. Once in Paul, Rom 10:21, cit. Mostly in Luke and Acts. Gainsay, Angl. Sax. gegn (Germ. gegen) “against,” and “say.” Wiclif, Luk 21:15 : For I schal gyue to you mouth and wysdom, to whiche alle youre aduersaries schulen not mowe agenstonde, and agenseye.”