v1-2: Paul's determination was to bring joy, not sorrow; such is the ministry of the servant of God.
v3-11: Following on from 1 Cor 5.1-5; forgiveness to follow discipline. The ultimate aim is that the person receiving discipline be restored to Christ and to the fellowship, "his spirit may be saved" (1 Cor 5.5), "that they may learn not to blaspheme" (1 Tim 1.20).
v3-4: Paul's fatherly concern (1 Cor 4.14-15); with much affliction, anguish of heart, and many tears. He was looking forward to sharing joyfully together.
v5-6: They had to realise that the guilty man had grieved (or pained) the whole church. However, the punishment he had received was sufficient. The danger was that the discipline of a brother was too severe.
v7-8: The one who was put away, delivered to Satan, may now be forgiven and comforted. Our love for him should be reaffirmed. This is an important stage in disciplining a sinning brother.
v9: If we are obedient in disciplining, we should also be obedient in forgiving. Such discipline has to be administered properly by the church, not by any individual, or group, within it. Therefore there is no place for personal animosity.
v10: Paul fully supported the church in their discipline. Where they had now forgiven him, Paul shared that forgiveness, and honoured the actions of the church.
v11: We must be aware that Satan will use any opportunity to attack the people of God; he uses schemes, strategies, devices, and deceits. His attacks are nor 'fair', for his only rules are his own rules. He attacks through temptation and sin, through the failure of the church to exercise proper discipline, through the failure of the church to receive a repentant brother. He will use such things to bring doubt, discouragement, and division.
v12: From here to 7.4, Paul explains the nature of his ministry, and he defends it. Some had attacked his authority to act as an apostle.
v12-13: Paul's visit to the area. In his second missionary journey, Paul went to Troas, then to Macedonia, and then to Corinth (Acts 16-18).
v14-16: We are the very fragrance of Christ; this demands that we reflect His character to others. Our conduct is with simplicity and godly sincerity (1.12). This will not see everyone saved, for to some it is the aroma of death to death. This fragrance is a proof of the true servant of God.
v17: Paul's ministry was transparently sincere, "you yourselves know" (1 Thess 2.1,5,9).
To peddle, or corrupt (Gk: KAPELEUO), is different from merchant (Gk: EMPOROS) – many, is seems, had treated the gospel as the latest fad, a popular bandwagon, by which they might line their pockets. Paul also suggests that these false apostles had visited Corinth (3.1; 11.4).