These verses are the beating heart of Paul’s reconciling gospel. Ambassadors do not invent a message; they carry a King’s plea. God Himself is making His appeal through human voices: Be reconciled to God. The initiative is divine. The offended One seeks the offenders. That alone overturns religion as our climb toward an indifferent deity.
“Be reconciled” assumes a real breach. Sin is not a small misstep; it is enmity that requires peace. Yet the call is urgent and gracious. The day of salvation is now (6:2). The church’s mission is not scolding the world from a safe balcony but speaking as people already reconciled who long for others to come home.
Verse 21 explains how reconciliation is possible. Christ “knew no sin”—spotless in nature and life. Yet God “made him to be sin on our behalf”: the sinless One was treated as sin, bearing our curse and guilt at the cross. This is substitution, not mere example. The Just suffers for the unjust to bring us to God.
The purpose clause is breathtaking: “that we might become the righteousness of God in him.” In Christ we receive a righteousness that is God’s own gift and standing, not a thin coat of religious effort. Union with Jesus means exchange—our sin counted to Him, His righteousness counted to us—and a new life that begins to match the verdict.
Hold the two sides together. Without verse 21, ambassadorship is empty optimism. Without verse 20, the atonement becomes a private possession we never announce. Gospel people both rest in the exchange and speak the plea.
Pastoral takeaway: if you feel disqualified to speak for God, remember ambassadors are authorized by the King, not by their polish. If you feel too stained to approach God, look at Him who knew no sin made sin for you.
Preach and pray these verses often. Let “Be reconciled to God” shape evangelism, and let “become the righteousness of God in him” silence despairing consciences.
Linger here until gratitude and mission rise together. Then live as someone claimed by Christ’s cross—dependent on grace, clear about the gospel, and eager to carry God’s plea. Let the exchange at the cross silence both pride and despair: you contribute sin; Christ contributes righteousness; God contributes the plea. Walk as an ambassador this week—someone’s reconciliation may ride on your courage to speak.