Ephesians 4:13 - Matthew Poole's English Annotations on the Holy Bible

Till we all come, or meet; all we believers, both Jews and Gentiles, (who while in the world not only are dispersed in several places, but have our several degrees of light and knowledge), meet, or come together, in the unity of, &c. In the unity of the faith; either that perfect unity whereof faith is the bond, or rather that perfect uniformity of faith in which we shall all have the same thoughts and apprehensions of spiritual things, to which as yet, by reason of our remaining darkness, we are not arrived. And of the knowledge of the Son of God; or acknowledgment, i.e. not a bare speculative knowledge, but such as is joined with appropriation and affection. Unto a perfect man: he compares the mystical body of Christ to a man, who hath his several ages and degrees of growth and strength, till he come to the height of both, and then he is a perfect man, or a man simply, in opposition to a child, 1 Corinthians 13:11. The church of Christ (expressed by a man, in the singular number, to show its unity) hath its infancy, its childhood, its youth, and is to have hereafter its perfect manhood and state of consistency in the other life, when, being arrived to its full pitch, it shall be past growing. Unto the measure of the stature of the fulness of Christ; either actively, that measure of stature or age which Christ fills up in it, or hath allotted to it, Ephesians 4:7; or rather passively, that measure which, though it do not equal, yet it shall resemble, being perfectly conformed to the fulness of Christ. As in Ephesians 4:12 he showed the end of Christ's appointing officers in his church, so here he shows how long they are to continue, viz. till their work be done, the saints perfected, which will not be till they all come to the unity of the faith, &c.