Titus 1:9

“Holding fast the faithful word, etc.] The doctrine of the Gospel, so called because it is true, and to be believed; it is the word of truth, and truth itself, and contains nothing but truth; and because it never deceived any, that gave credit to its doctrines, and its promises; and because it is pure, unmixed, and unadulterated, and is the sincere milk of the word; and because in it is a glorious display of the faithfulness of God to his perfections, to his holiness and justice, to his law, and to his covenant, word, and oath; and of the faithfulness of Christ, to him that appointed him and to his covenant engagements, and which has appeared in the discharge of his various offices: and this…”

“Holding fast--Holding firmly to (compare Mat 6:24; Luk 16:13). the faithful--true and trustworthy (Ti1 1:15). word as he has been taught--literally, "the word (which is) according to the teaching" which he has received (compare Ti1 4:6, end; Ti2 3:14). by--Translate as Greek, "to exhort in doctrine (instruction) which is sound"; sound doctrine or instruction is the element IN which his exhorting is to have place . . . On "sound" (peculiar to the Pastoral Epistles), see Ti1 1:10; Ti1 6:3. convince--rather, "reprove" [ALFORD], (Tit 1:13).”

“Holding fast the faithful word - That is, the true doctrines of the gospel. This means that he is to hold this fast, in opposition to one who would wrest it away, and in opposition to all false teachers, and to all systems of false philosophy. He must be a man who is firm in his belief of the doctrines of the Christian faith, and a man who can be relied on to maintain and defend those doctrines in all circumstances; compare notes, 2 Thessalonians 2:15. As he hath been taught - Margin, “in teaching.” Greek “According to the teaching.” The sense is, according to that doctrine as taught by the inspired teachers of religion. It does not mean as he had individually been taught; but he was to hold…”

“As he hath been taught - Perhaps it might be more literally rendered, according to the teaching, or doctrine, of the apostles; alluding to Act 2:42. Titus 1:10”

“1:9 The elders had a leading role in teaching the community. This may have been necessary in dealing with the immediate threat to these particular communities (as also in Ephesus; see 1 Tim 3:1). • Only with a strong belief in the Good News would an elder be able to provide wholesome teaching. Paul’s specific concerns are addressed in Titus 2:1–3:11, in light of the problems mentioned in 1:10-16 and 3:9-11 (see also 1 Tim 1:10). • Titus had a similar role (cp. Titus 1:13; 2:15; 3:10-11). The local leadership would carry on where Paul and his delegates left off. • Those who oppose it are described in 1:10-16.”

“Holding: Job 2:3, Job 27:6; Pro 23:23; Th1 5:21; Th2 2:15; Ti2 1:13; Jde 1:3; Rev 2:25, Rev 3:3, Rev 3:11 fast: Ti1 1:15, Ti1 4:9, Ti1 6:3; Ti2 2:2 as he hath been taught: or, in teaching sound: Tit 2:1, Tit 2:7, Tit 2:8; Ti1 1:10, Ti1 6:3; Ti2 4:3 to convince: Tit 1:11; Act 18:28; Co1 14:24; Ti2 2:25 Titus 1:10”