1 Timothy 1:10

ἀνδραποδισταῖς, plagiariis (Vulg.), includes all who exploit other men and women for their own selfish ends; as πόρνοις and ἀρσενοκοίταις include all improper use of sexual relations.

διδασκαλία means the body of doctrine, the apostolic Summa Theologiæ. The noun is used absolutely, 1 Timothy 6:1, or with varying epithets: ὑγιαίνουσα, sana (here, 2 Timothy 4:3; Titus 1:9; Titus 2:1); καλή, bona (1 Timothy 4:6); κατʼ εὐσέβειαν, secundum pietatem (1 Timothy 6:3); μου (2 Timothy 3:10); τοῦ σωτῆρος ἡμῶν θεοῦ (Titus 2:10).

It means the act of teaching in Romans 12:7; Romans 15:4, 1 Timothy 4:13; 1 Timothy 4:16; 1Ti 5:17, 2 Timothy 3:16; Titus 2:7. The term occurs fifteen times in the Pastoral Epistles in a technical Christian sense. This is in the writer's mind even in 1 Timothy 4:1, διδασκαλίαις δαιμονίων. It is found four times in the other Pauline Epistles. Of these Romans 12:7 is the nearest approach to the special connotation here.

With ὑγιαίνουσα (see reff.) compare ὑγιαίνοντες λόγοι (1 Timothy 6:3; 2 Timothy 1:13), λόγος ὑγιής (Titus 2:8), and ὑγιαίνειν (ἐν) τῇ πίστει (Titus 1:13; Titus 2:2).

The image is peculiar to the Pastoral Epistles; but it is not therefore un-Pauline, unless on the assumption that a writer never enlarges his vocabulary or ideas. Healthy, wholesome admirably describes Christian teaching, as St. Paul conceived it, in its complete freedom from casuistry or quibbles in its theory, and from arbitrary or unnatural restrictions in its practice. The terms νοσῶν as applied to false teaching (1 Timothy 6:4), and possibly γάγγραινα (2 Timothy 2:17) were suggested by contrast. See Dean Bernard's note on this verse.