This is guaranteed to the believer. The believer has eternal security. And the evidence or seal or mark of those born of God is the effects of the Holy Spirit whom the believer has received and through whom the believer has been born of God.
Are we with the Lord or are we away from the Lord? For is it not also written: "He who has the Son has life; he who does not have the Son of God does not have life." 1John 5:12 And "I have been crucified with Christ and I no longer live, but Christ lives in me." Gal 2:20 But really we do not have the Son himself in us in a literal sense, but rather the Holy Spirit in us who represents the Son. So when Paul says that while we are in the body we are away from the Lord, he is speaking in a literal sense, while when he says, "Christ lives in me", he is speaking in a metaphorical sense.
Why I point out this distinction is that I've noticed some who define Christ as however they feel. They believe in the Christ in them, but don't necessarily take care to conform their idea of "Christ" to the the Christ of the Bible. Thus they may end up making Christ into their own image and essentially worshipping themselves.
Paul prefers the literal presence of Christ over his metaphorical presence in the Holy Spirit. Don't be satisfied with your Christian life now, for it will be better in the future.
vs 9-13 However, when we consider being in the literal presence of Christ, we have to also consider the judgement to come. Realizing, of course, that we've escaped from the judgement which leads to condemnation as Jesus said, "I tell you the truth, whoever hears my word and believes him who sent me has eternal life and will not be condemned; he has crossed over from death to life." John 5:24 (niv)
Yet there is a judgement unto rewards for the believer, which is more elaborated upon in 1Cor 3:11-15, in which ones sins are burned up and what's left over is rewarded. But also, when considering motivations for the ministry of evangelism, there is also the judgement of the unbelievers, which is according to their unforgiven works, which inevitably leads to condemnation in view of man's innate sinfulness. Therefore in view of God's judgement of us and of others, we try to persuade men. But this implies also that we are able to persuade men. At least in certain cases. Evangelism is not simply communicating information, but persuading men. We need to communicate our sincere convictions.
But why does Paul share all this information with the Corinthians? Certainly he wants to develop in them a sense of co-laboring, but throughout his message has also been trying to affirm his ministry among them. Why? Because there are those false teachers who are opposing him, who take pride in what is seen. There are many who take pride in what is seen. They may take pride in "titles" or in numbers or in buildings or programs, but miss out on the heart of the matter. But we walk by faith and not by sight.
vs 14-21 Paul had mentioned the fear of God's judgement as a motivating factor in evangelism. But here he mentions the love of Christ.
vs 15 There are those who accept Christ as Savior but not as Lord. They have the attitude that having been forgiven of sin, they can go on to live their lives however they please. They view Christ as their personal servant. But here Paul reveals that those who live should no longer live for themselves, but for Christ.
vs 16 The most essential categorization of people is whether they have Christ. "He who has the Son has life; he who does not have the Son of God does not have life." 1John 5:12
vs 17 Being born of God changes a person's nature so that he no longer will be the same kind of person. He is a different kind of creature than the non-Christian, having the permanent presence of the Holy Spirit dwelling in him. This has an inevitable affect on his behavior.
"No one who is born of God will continue to sin (in a lifestyle sense), because God's seed remains in him; he cannot go on sinning, because he has been born of God." 1John 3:9vs 18-19 Central to the gospel message is the idea of being reconciled to God. As non-Christians we are separated from God and his enemies because of our sin. But now Christ died to reconcile us with God. Often I've heard a distorted gospel message saying, "If you pray and receive Jesus, he'll make you into a better person and make you feel good." Often there is no mention of our sin separating us from God, or Christ's atoning work on the cross. And the excuse is, "Oh, we don't want to offend people or turn people off by talking about such negative things like sin and death. Let's talk about life!". It is a distorted gospel."This is love for God: to obey his commands. And his commands are not burdensome, for everyone born of God overcomes the world." 1John 5:3,4
vs 20 An ambassador is an official representative of someone or some country. As a Christian, you are Christ's ambassador, like it or not. As such we have to consider that how the world views us reflects on Christ. But it also means that we have legitimate authority to minister. For didn't Jesus say,
"All authority in heaven and on earth has been given to me. Therefore go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, and teaching them to obey everything I have commanded you. And surely I am with you always, to the very end of the age." Matt 28:18-20Paul implores the nominal believers among the Corinthians to be reconciled to God. Just as he does in 2Cor 13:5.
vs 21 Though Christ had no sin, he symbolically represented our sin in his death on the cross. Now symbolically as representatives of Christ, we become a channel of God's righteousness. For it is through us that the world comes to know Christ and thus obtains righteousness through faith in Christ.
The Boston Christian Bible Study Resources Apr 12,2004