The relation of Paul to Timothy is an example of one of those beautiful friendships between an older and a younger man, in which each is the complement of the other, 1Co 4:17; Php 2:22. Timothy was a lad of fifteen when converted at Lystra, and was probably about thirty-five years of age when this Epistle was addressed to him. He was enthusiastic and devoted but at times showed signs of timidity, and the Apostle watched over him with tender interest.
In this chapter the young minister is warned against the Gnostic heresy, i.e., the heresy of the knowing-ones, who pretended to give revelations about the angels and their ministry, and to bridge the gulf between man and God by a whole series of mysterious imaginary beings. Their teaching led from spiritual pride to sensuality, for they accounted the body as inherently evil. All this was contrary to healthy doctrine. That word sound, or healthy, is peculiar to the Pastoral Epistles, 1Ti 6:3; 2Ti 1:13; 2Ti 4:3; Tit 1:9; Tit 2:1. It suggests a certain test of the various teachers who cross our paths. The question always is, Do these words of theirs promote the health of the soul, and above all, love out of a pure heart and a good conscience?