Titus 2:10

μὴ νοσφιζομένους : non fraudantes (Vulg.), not purloining. The particular form of theft implied is the abstraction or retention for oneself, of a part of something entrusted to one's care.

πᾶσαν πίστιν ἐνδεικνυμένους ἀγαθήν : displaying the utmost trustworthiness. There is a similar phrase in ch. Titus 3:2, πᾶσαν ἐνδεικ. πραΰτητα. See note on 2 Timothy 4:14. On this use of πᾶς, See on 1 Timothy 1:15. πίστιν has a qualifying adj. elsewhere, e.g., ἀνυπόκριτος (1 Timothy 1:5; 2 Timothy 1:5. Cf. ch. Titus 1:4; 2 Peter 1; Jude 1:20), but the addition of another adj. after πᾶς is unusual. In Clem. Romans 1 Cor. 26 πίστις ἀγαθή is rendered by Lightfoot honest faith; but honest fidelity would be an odd expression. Von Soden would give ἀγαθή here the sense of kind, wishing well, as in Titus 2:5, and as a contrast to ἀντιλεγ., as πιστιν is to νοσφ. W.H. suggest that the original reading here was πᾶσαν ἐνδεικνυμένους ἀγάπην. See apparat. crit.

διδασκαλίαν : See note on 1 Timothy 1:10.

Θεοῦ refers to God the Father. See Titus 1:3. Von Soden takes it here as objective genitive; the διδασκαλία being set forth in Titus 2:11-14.

κοσμῶσιν : cf. 1 Timothy 2:9, κοσμεῖν ἑαυτάς … διʼ ἔργων ἀγαθῶν. The διδασκαλία, though really practical, can be plausibly alleged to be mere theory; it must then, by good works, be rendered attractive to them that are without. Cf. Matthew 5:16; Philippians 2:15.