Till we all come in the unity of the faith, and of the knowledge of the Son of God, unto a perfect man, unto the measure of the stature of the fulness of Christ.
The work of God is not finished in the heart and life of the new believer when the first act of inward adjustment has given him a sense of cleansing and forgiveness, peace and rest for the first time in his life!
The Spirit would go on from there to bring the total life into harmony with that blissful “center.” This is wrought in the believer by the Word and by prayer and discipline and suffering.
It could be done by a short course in things spiritual if we were more pliable, less self-willed and stubborn; but it usually takes some time before we learn the hard lessons of faith and obedience sufficiently well to permit the work to be done within us with anything near to perfection.
In bringing many sons unto glory God works with whatever He has in whatever way He can and by whatever means He can, respecting always His own gift to us, the freedom of our wills. But of all means He uses, the Bible is the best.
The Word of God well understood and religiously obeyed is the shortest route to spiritual perfection, and we must not select a few favorite passages to the exclusion of others. Any tinkering with the truth, any liberties taken with the Scriptures, and we throw ourselves out of symmetry and invite stiff discipline and severe chastisement from that loving Father who wills for us nothing less than full restoration to the image of God in Christ!
The building up of the redeemed involves a two–fold ultimate objective, which Paul identifies as the unity of the faith and the knowledge of the Son of God, out of which flow spiritual maturity, sound doctrine, and loving testimony.
Some commentators advocate the view that such an ultimate objective is only attainable at glorification, believing that Paul is describing our final heavenly unity and knowledge. But that idea does not fit the context at all, because the apostle is not describing the final work of Christ on behalf of the church in heaven but the work of gifted men in the church on earth. These results could only apply to the church in its earthly dimension.
Unity of the Faith
The ultimate spiritual target for the church begins with the unity of the faith (cf. v. 3). As in verse 5, faith does not here refer to the act of belief or of obedience but to the body of Christian truth, to Christian doctrine. The faith is the content of the gospel in its most complete form. As the church at Corinth so clearly illustrates, disunity in the church comes from doctrinal ignorance and spiritual immaturity. When believers are properly taught, when they faithfully do the work of service, and when the body is thereby built up in spiritual maturity, unity of the faith is an inevitable result. Oneness in fellowship is impossible unless it is built on the foundation of commonly believed truth. The solution to the divisions in Corinth was for everyone to hold the same understandings and opinions and to speak the same truths (1 Cor. 1:10).
God’s truth is not fragmented and divided against itself, and when His people are fragmented and divided it simply means they are to that degree apart from His truth, apart from the faith of right knowledge and understanding. Only a biblically equipped, faithfully serving, and spiritually maturing church can attain to the unity the faith. Any other unity will be on a purely human level and not only will be apart from but in constant conflict with the unity of the faith. There can never be unity in the church apart from doctrinal integrity.
Knowledge of Christ
The second result of following God’s pattern for building His church is attaining the knowledge of the Son of God. Paul is not talking about salvation knowledge but about the deep knowledge (epignōsis, full knowledge that is correct and accurate) through a relationship with Christ that comes only from prayer and faithful study of and obedience to God’s Word. After many years of devoted apostleship Paul still could say, “I count all things to be loss in view of the surpassing value of knowing Christ Jesus my Lord, for whom I have suffered the loss of all things, and count them but rubbish in order that I may gain Christ, and may be found in Him, … that I may know Him, and the power of His resurrection and the fellowship of His sufferings. … Not that I have already obtained it, or have already become perfect, but I press on in order that I may lay hold of that for which also I was laid hold of by Christ Jesus” (Phil. 3:8–10, 12). Paul prayed that the Ephesians would have that “knowledge of Him” (1:17; cf. Phil. 1:4; Col. 1:9–10; 2:2). Growing in the deeper knowledge of the Son of God is a life–long process that will not be complete until we see our Lord face–to–face. That is the knowing of which Jesus spoke when He said, “My sheep hear My voice, and I know them” (John 10:27). He was not speaking of knowing their identities but of knowing them intimately, and that is the way He wants His people also to know Him.
The third result of following God’s pattern for His church is spiritual maturity, a maturity to the measure of the stature which belongs to the fulness of Christ. God’s great desire for His church is that every believer, without exception, come to be like His Son (Rom. 8:29), manifesting the character qualities of the One who is the only measure of the full–grown, perfect, mature man. The church in the world is Jesus Christ in the world, because the church is now the fullness of His incarnate Body in the world (cf. 1:23). We are to radiate and reflect Christ’s perfections. Christians are therefore called to “walk in the same manner as He walked” (1 John 2:6; cf. Col. 4:12), and He walked in complete and continual fellowship with and obedience to His Father. To walk as our Lord walked flows from a life of prayer and of obedience to God’s Word. “We all, with unveiled face beholding as in a mirror the glory of the Lord, are being transformed into the same image from glory to glory, just as from the Lord, the Spirit” (2 Cor. 3:18). As we grow into deeper fellowship with Christ, the process of divine sanctification through His Holy Spirit changes us more and more into His image, from one level of glory to the next. The agent of spiritual maturity, as well as of every other aspect of godly living, is God’s own Spirit—apart from whom the sincerest prayer has no effectiveness (Rom. 8:26) and even God’s own Word has no power (John 14:26; 16:13–14; 1 John 2:20).
It is obvious that believers, all of whom have unredeemed flesh (Rom. 7:14; 8:23), cannot in this life fully and perfectly attain the measure of the stature which belongs to the fulness of Christ. But they must and can reach a degree of maturity that pleases and glorifies the Lord. The goal of Paul’s ministry to believers was their maturity, as indicated by his labors to “present every man complete (teleios, mature) in Christ” (Col. 1:28–29; cf. Phil. 3:14–15).
4:13 Verse 13 answers the question, “How long will this growth process continue?” The answer is till we all come to a state of unity, maturity, and conformity.
Unity. When the Lord takes His church home to heaven, we will all arrive at the unity of the faith. “Now we see in a mirror dimly” with regard to many matters. We have differences of opinion on a host of subjects. Then we will all be fully agreed. And we will reach the unity of … the knowledge of the Son of God. Here we have individual views of the Lord, of what He is like, of the implications of His teachings. Then we will see Him as He is, and know as we are known.
Maturity. At the Rapture we will also reach full growth or maturity. Both as individuals and as the Body of Christ, we will achieve perfection of spiritual development.
Conformity. And we will be conformed to Him. Everyone will be morally like Christ. And the universal church will be a full-grown Body, perfectly suited to its glorious Head. “The fulness of Christ is the Church itself, the fulness of Him that filleth all in all” (FWG). The measure of the stature of the church means its complete development, the fulfillment of God’s plan for its growth.
13 Here we encounter three goals that Paul specifies “we all” (hoi pantes) ought to reach or attain. Paul includes himself in this collective goal for all Christians (recall v. 7: “to each one of us grace has been given”), not just the gifted leaders. This also confirms that “works of service” (v. 12) refers to the congregation, not the leaders. The conjunction “until” (mechri) specifies both the time frame and the purpose of the leaders’ work: they labor until. Though the church already is the fullness of Christ—its identity (1:23)—its members strive until they achieve “the whole measure of the fullness” (cf. 3:19). The first goal is unity in two dimensions: “in the faith and in the knowledge of the Son of God.” Unity in the faith (Greek objective genitive) points to a common trust in and assent to the “one faith” (recall v. 5). Since there is only one (body of) faith and one Jesus, faith in whom secures salvation, church members need to embrace it in common. Whatever differences of opinion we possess on various matters, on the central core issues of the faith we must strive for unity.
Unity in knowledge (again, an objective genitive) has an intriguing object: “of the Son of God” (the Son being the object of believers’ knowledge). Probably this second phrase unpacks the meaning of the “unity in the faith.” For the first time in Ephesians, Paul calls Jesus by this title (he uses it elsewhere only in Ro 1:4; 2 Co 1:19; Gal 2:20; cf. Ac 9:20). There are both relational and informational dimensions to our knowledge of Christ (see commentary on 1:17). Unity centers in Jesus, and the goal for Christian learning is to “know [Christ] better,” personally and intimately (1:17; cf. Php 3:10; Col 2:20; 2 Pe 3:18), as the one who loves us and gave himself for us. Knowing God and his Son Jesus is the very essence of eternal life (Jn 17:3; Eph 4:20; cf. 2 Pe 1:8; 2:20). Jesus’ parting instructions stressed the need to teach followers of Jesus to obey everything he commanded (Mt 28:20). Having listed the unshakable realities in vv. 4–6, now Paul stresses the need for a unified knowledge or understanding of the central Christian truths. We see their opposite in v. 14—immature people flummoxed by various teachings and wily deceivers. Leaders must equip the saints to secure unity in their beliefs and knowledge. Christians ought to espouse unequivocally a common worldview instructed by the one faith centered in the knowledge of Christ and true beliefs about him.
A second objective is to “become mature,” literally, “to a mature man,” taking the church as a corporate whole. “Man” translates anēr (GK 467), the gender-specific term for adult male (or husband, as in 5:22–33), here modified by “mature” (or “perfect”), denoting a full-grown, mature person (cf. BDAG, 79). Paul’s point here is not that the individual men of the church become mature (requiring the plural “men”), but that the corporate body of Christ does (cf. Best, 401; Lincoln, 256; Schnackenburg, 85; O’Brien, 307). Paul’s goal is a perfect church, as the “whole measure of the fullness of Christ” implies. So leaders have the task of promoting maturity, and all members have the responsibility to ensure that the body of Christ grows up spiritually. The failure to work at this leaves people as spiritual “infants” (v. 14). In v. 16 Paul spells out what maturity entails; in v. 17 he starts delineating its results in the life of the body.
This passion for the church’s maturity underlies Paul’s third goal for the body: to attain, literally, “the measure of the stature of the fullness of Christ.” On “fullness,” see commentary at 1:23. In referring to “stature” (hēlikias [GK 2461], NASB; not in the NIV), Paul introduces the metaphor of a physical body—one he will develop in vv. 15–16. Recall that at 3:19 Paul prayed that the readers would be filled “to the measure of all the fullness of God.” What might the “measure of the stature of the fullness of Christ” imply here? “Stature” refers to either a person’s age or physical size. It implies maturity, full growth in size or age. We find a general depiction of the metaphor in vv. 15b–16 and the specific traits in the remainder of the letter. Christ is the standard for maturity. Christ seeks to give the church his fullness. Measuring up to Christ is the church’s ideal and target—the goal of knowing him. Maturity as a church derives only through its integral relationship to Christ as it comes to know him more and more. Leaders in their equipping and the church in its growing must strive for nothing less than full Christlikeness.
 Tozer, A. W., & Smith, G. B. (2015). Evenings with tozer: daily devotional readings. Chicago, IL: Moody Publishers.
 MacArthur, J. F., Jr. (1986). Ephesians (pp. 156–158). Chicago: Moody Press.
 MacDonald, W. (1995). Believer’s Bible Commentary: Old and New Testaments. (A. Farstad, Ed.) (p. 1936). Nashville: Thomas Nelson.
 Klein, W. W. (2006). Ephesians. In T. Longman III & D. E. Garland (Eds.), The Expositor’s Bible Commentary: Ephesians–Philemon (Revised Edition) (Vol. 12, pp. 119–120). Grand Rapids, MI: Zondervan.