1 Timothy 4:12

Let no man despise thy youth
Timothy was now a young man; some think he was about three and twenty years of age; but he might be older, and yet be so called. Saul is said to be a young man, when he held the clothes of them that stoned Stephen, when he must be at least thirty years of age, some say thirty five; since thirty years after that he styles himself Paul the aged, when he must be sixty years of age and upwards, ( Acts 7:58 ) ( Philemon 1:9 ) . Young men are sometimes honoured by God with great gifts, for usefulness both in church and state, as Samuel, David, Solomon, Daniel, and his companions: nor should they be despised on account of their age, when they have gifts suitable to their office, and behave well in it, but, on the contrary, ought to be esteemed for their works' sake; and such should take care that no man has an opportunity or reason to treat them with contempt on that account: the apostle's sense is, either that Timothy, being in office, should not suffer any man to use him contemptuously; but exert his power and authority, and magnify his office, and not allow men to trample upon him, or use him ill, though he was a young man; which sense suits with the preceding words: or rather his meaning is, that he would have him so conduct and behave himself, as he had taught him to behave, in the house and church of God, and so fill up his place and office, and live such an exemplary life and conversation, that there might be no occasion for any to despise his age, or him, on the account of it: and this agrees with what follows, but be thou an example of the believers;
the members of the church, before called brethren, from their relation to one another, and here believers, from their concern with Christ, the object of their faith; a more honourable character cannot be given of men, though treated with great contempt in this age of infidelity. The Mahometans would engross this character to themselves, calling themselves the believers, and reckoning all others infidels; but to them only it belongs, who believe in Christ unto righteousness and life everlasting. Now sometimes young men may be examples to older ones; and all that are in office in the church, especially in the ministry, whether old or young, should be ensamples to the flock, and that in the following things: "in word"; meaning either the word of truth, the doctrine of the Gospel; by delivering that which is according to the rule of God's word, showing in it uncorruptness, gravity, and sincerity, and by holding it fast; all which may for the imitation of others, to receive the pure doctrine and retain it: or rather this may respect common discourse; which should not be corrupt, filthy, nor foolish; but should be always with grace, Seasoned with salt, or should be grave and serious, wise and prudent, pleasant, profitable, and edifying. In conversation;
in the family, church, and world; which should be as becomes the Gospel of Christ, in all godliness and honesty, with simplicity and godly sincerity; so as to adorn the doctrine of God our Saviour, recommend it to others, stop the mouths of gainsayers, and obtain a good report of them that are without. In charity;
in love to God, to Christ, and one another; without which, if a man has the tongue of men and angels, or ever such great and excellent gifts, he is nothing. In spirit;
in the exercise of spiritual gifts; in spiritual talk and conversation; and in fervency of spirit, or true zeal for the honour of God, the glory of the Redeemer, the spread of his Gospel, truths, and ordinances, and the support of the same. This clause is wanting in the Alexandrian and Claromontane copies, and in the Vulgate Latin, Syriac, and Ethiopic versions. In faith;
in the exercise of the grace of faith; in holding fast the profession of faith; and in retaining the doctrine of faith, with all integrity, faithfulness, and constancy, standing fast in it, striving and contending for it. In purity;
or chastity of body, in opposition to all impurity of the flesh, by fornication, adultery, and the like; which was very proper to be suggested to a young man: though this may also have respect to all that is before said, as to purity of language, conversation, love, zeal, and faith.