Hebrews 5:12

For when for the time ye ought to be teachers,.... These Hebrews had had great advantages; they were not only descended from Abraham, and had the law of Moses, and the writings of the Old Testament, but some of them had enjoyed the ministry of Christ, and however of his apostles; and it was now about thirty years from the day of Pentecost, in which the gifts of the Holy Ghost were bestowed in such an extraordinary manner, and a large number were converted, and a church state settled among them; and therefore considering the length of time, the opportunities and advantages they had enjoyed, it might have been expected, and indeed it is what should have been, that they would have been teachers of others, some in a private, and some in a public way: from whence it may be observed, that to have time for learning, and yet make no proficiency, is an aggravation of dulness; moreover, that men ought to be hearers, and make some good proficiency in hearing, before they are fit to be teachers of others; also, that persons are not only to hear for their own edification, but for the instruction of others, though all hearers are not designed for public teachers; for to be teachers of others, requires a considerable share of knowledge: to which may be added, that the churches of Christ are the proper seminaries of Gospel ministers.