Now all these things are from God, who reconciled us to Himself through Christ and gave us the ministry of reconciliation, namely, that God was in Christ reconciling the world to Himself, not counting their trespasses against them, and He has committed to us the word of reconciliation. Therefore, we are ambassadors for Christ, as though God were making an appeal through us; we beg you on behalf of Christ, be reconciled to God. (2 Cor. 5:18-20)
An ambassador is an official dignitary who represents the country that sent him into a foreign land, and his message is derived from the sending ruler. The Christian ambassador represents the Lord Jesus Christ who has called and equipped him to speak on His behalf to those outside of Christ’s kingdom (John 18:36; Acts 26:17-18; Col. 1:13-14). The Christian message is simple, that God reconciles us to Himself through the cross of Christ (2 Cor. 5:18-21; Eph. 2:13-16; Col. 1:19-20; 1 Pet. 3:18), providing us forgiveness for all our sins (Eph. 1:7; Col. 1:13-14), and the gift of His righteousness which makes us acceptable to Him (Isa. 61:10; 2 Cor. 5:21; Rom. 5:17; Phil. 3:9).
God does not have to be reconciled to man, because that was accomplished by Christ on the cross. It is sinful man who must be reconciled to God. “Religion” is man’s feeble effort to be reconciled to God, efforts that are bound to fail. The Person who reconciles us to God is Jesus Christ, and the place where He reconciles us is His cross.
As Christian ambassadors, “we do not preach ourselves but Christ Jesus as Lord, and ourselves as your bond-servants for Jesus’ sake” (2 Cor. 4:5). God always goes before us and providentially coordinates our meetings with others, working in their hearts to receive our message (John 16:7-11), and rescuing from Satan’s captivity those who believe the gospel (2 Cor. 4:3-4; 2 Thess. 2:24-26). God never forces Himself on anyone, but neither does He leave unpunished those who reject the Christian message (Rev. 20:11-15). Those who disregard God’s gracious offer of salvation choose to continue in Satan’s world system (John 15:19; Rom. 1:18-25; 1 John 2:15-17), selecting darkness rather than light (John 3:19-20), and choosing the path that leads to eternal destruction (Matt. 7:13-14). As heavenly ambassadors we are responsible to present a clear biblical message, and though we may passionately seek to persuade, we are not accountable for how others respond to it.
As an ambassador of Christ, we are to speak and act with dignity at all times. We are to be clear in speaking God’s truth to people who are made in His image (fallen as they are). We are to point them to Christ that they might turn to Him for salvation and be born again to a new spiritual life (1 Pet. 1:3, 23). We are to “speak the truth in love” (Eph. 4:15), “with grace” (Col. 4:6), and “with gentleness and respect” (1 Pet. 3:15-16). There’s no place for hostility in the Christian life, for “the anger of man does not achieve the righteousness of God” (Jam. 1:20). Scripture tells us:
The Lord’s bond-servant must not be quarrelsome, but be kind to all, able to teach, patient when wronged, with gentleness correcting those who are in opposition, if perhaps God may grant them repentance leading to the knowledge of the truth, and they may come to their senses and escape from the snare of the devil, having been held captive by him to do his will. (2 Tim. 2:24-26).
In closing, the Christian ambassador is one who adheres to the highest standards of moral excellence according to Scripture as he serves the Lord and communicates His message that God reconciles us to Himself through the cross of Christ (2 Cor. 5:18-21; Eph. 2:13-16; Col. 1:19-20; 1 Pet. 3:18), providing us forgiveness for all our sins (Eph. 1:7; Col. 1:13-14), and the gift of His righteousness which makes us acceptable to Him (Isa. 61:10; 2 Cor. 5:21; Rom. 5:17; Phil. 3:9).
Dr. Steven R. Cook
 Warren W. Wiersbe, The Bible Exposition Commentary, vol. 1 (Wheaton, IL: Victor Books, 1996), 649.