16. Look to yourself and to the teaching, persevere in them.
Holy living and sound teaching must go together if Timothy (or, for that matter, any apostolic representative, any minister, any elder, etc.) is to be a blessing. Hence, Paul admonishes Timothy to continue to focus (his mind, understood) on himself, that is, on his own duties, his own gift, his own privilege to go to the depths of God’s promise; particularly also upon the teaching (his own and that of others in the Ephesus district). He must stay on or persevere in them, that is, in holy living and in vigilance with respect to teaching. The promise is: “for by doing this you will save both yourself and those who hear you.” To be sure, a man is saved by grace, through faith; not by works (Titus 3:3; cf. Eph. 2:6–8); yet, since holy living and sound teaching are a fruit of faith, Paul is able to say that “by doing this” Timothy will save himself and his hearers. It is along the path of holy living and diligence in teaching and in watching over the life and teaching of others, that salvation (both present and future; see on 1 Tim. 1:15) is obtained. Besides, God promises a special reward to his faithful ministers, yes, to all his faithful witnesses (Dan. 12:3; Matt. 13:43; James 5:20); and threatens with severe punishment the unfaithful ones (Ezek. 33:7, 8).
William Hendriksen and Simon J. Kistemaker, Exposition of the Pastoral Epistles, vol. 4, New Testament Commentary (Grand Rapids: Baker Book House, 1953–2001), 160.