Continuing an expository series through Ephesians, the sermon turns to Ephesians 4:15–16, the closing verses of a passage on how the church is equipped and built up through the gifts Christ has given it — apostles, prophets, evangelists, pastors, and teachers. The sermon opens by returning to verse 14's warning against being "tossed to and fro by every wind of doctrine," building on the previous week's examples of false teaching (syncretism, health-and-wealth theology, prosperity gospel) with a further caution against what is popularly called the "Progressive Church." The sermon argues that this movement is not new but a repackaging of early-twentieth-century liberalism, marked chiefly by a low view of Scripture: rather than affirming that the Bible is the word of God, it treats Scripture as merely containing the word of God, allowing portions deemed outdated or culturally inconvenient to be trimmed away and judged by modern and postmodern frameworks instead of the reverse. The sermon notes that such churches often shift focus from the cross and the gospel toward social justice as the primary concern, and that their claim to "inclusivity" implicitly brands Bible-believing churches as regressive. The sermon insists that real reform means the church continually reforming itself back to Scripture, not conforming to the spirit of the age — while affirming that openness toward sinners, strugglers of every kind, and people of every race and background is genuinely biblical and central to the church's identity in Christ.

The sermon then turns positively to verse 15, preferring the more literal rendering "speaking the truth in love" over the Indonesian translation's "holding firmly to the truth in love." This call is set in its context: the gifts of verse 11 were given so the saints would be equipped for ministry and for building up the body until the church reaches unity of faith and knowledge of the Son of God. Speaking the truth in love, the sermon argues, is therefore not primarily about confronting individual sin but about the whole congregation — not only pastors and teachers — mutually teaching and reinforcing biblical truth to one another, citing Hebrews 3:12–13's charge to "exhort one another daily" against the deceitfulness of sin. The sermon lays out four possible combinations of truth and love: no truth and no love, which is the way of Satan, who deceives while appearing to offer care (as in the temptation in Eden); truth without love, which wounds and drives people away even when the content is correct, illustrated by legalistic rigidity and contrasted with Jesus, who spoke fierce judgment to hardened, hypocritical Pharisees yet tender truth to the woman caught in adultery ("neither do I condemn you; go, and sin no more"); love without truth, which spoils and ruins through permissiveness, as with parents who indulge children into "spoiled" ruin in the name of love; and truth spoken in love, which alone builds people up, following the pattern of Christ, who knew the full depth of human sin yet loved enough to die for us while we were still enemies of God. The sermon calls the congregation, especially in mentoring the many young people newly arrived (many from Indonesia) into a Western, secularized environment, to embody this combination — loving people while never compromising on truth, and choosing friends who are willing to speak truth in love rather than simply affirming whatever one does.

The sermon then moves to verse 16's picture of the body "joined and held together by every joint with which it is equipped," growing as "each part does its work." Drawing on 1 Peter 4:10–11's call to serve one another as good stewards of God's varied grace, the sermon argues that church growth happens as every member serves according to the gift and measure given to them, likening this to a physical body in which every organ, joint, and even a single pinched nerve affects the whole — no member is unneeded, and no member can say the body does not need them. Personal testimony (a young man's growth through cancer, supported by the whole church; the simple discipline of arriving early to tidy chairs) illustrates that service, however small, both builds the body and matures the one who serves, and that spiritual growth should also produce "multiplication" — the church bearing spiritual children, not merely maintaining itself.

Finally, the sermon turns to Christ as both the source and the goal of the church's growth, from verse 16's "from whom the whole body... grows." Just as neuroscience shows the brain governs and coordinates the entire body, Christ as head governs and grows the whole church; the sermon draws an analogy between "guarding your heart" (Proverbs 4:23) and the renewing of the mind (Romans 12:2), noting that the brain's prefrontal cortex — governing decision-making, self-control, and morality — continues developing until about age 25, making the formation of youth and young adults through truth and service spiritually decisive: minds shaped early by the world's values are shaped with great difficulty, while those formed early by the word bear fruit readily. The sermon closes with a call to keep growing — through speaking truth in love, through evangelism amid a multicultural society, and through mutual service according to each one's gift — until Christ returns, producing the fruit of the Spirit (love, joy, peace, patience, kindness) that blesses others, and ends in an invitation to full surrender to Christ.

Bible Verses Used

• Ephesians 4:11–16: The controlling passage; verses 15–16 (speaking the truth in love; the body built up as each part does its work) form the sermon's two main points, framed by verses 11–14 on the gifts given to equip the saints and guard against false doctrine.

• Hebrews 3:12–13: Cited to show that "speaking the truth in love" includes the whole congregation exhorting one another daily against the deceitfulness of sin.

• John 8 (the woman caught in adultery): Used to illustrate truth spoken in love — Jesus refuses to condone her sin ("go, and sin no more") while extending mercy rather than condemnation.

• 1 Peter 4:10–11: Grounds the call for every member to serve one another according to the grace and gift received, illustrating verse 16's "each part does its work."

• Romans 12:2: Connected to "guarding your heart" (Proverbs 4:23) to support the point that the mind/heart, once renewed by God's word, produces a life conformed to Christ.

• John 15: Referenced ("abide in me... apart from me you can do nothing") to reinforce Christ as the source from whom the church draws its growth.