God's Ministry of Reconciliation (2 Corinthians 5:11 to 2 Corinthians 6:2).
Having spoken of God's work in the heart through His Spirit, and of the new covenant, followed by the revelation of the Christian's future by means of the resurrection, Paul now goes back to the basis of it all, man's reconciliation with God. If men are to know these things that he has described there needs to be a new creation. And man needs to be reconciled to God, a reconciliation which is only found in Christ through the cross.
But before he can press home that message he feels he must again bring out his own genuineness in comparison with those who are all outward show.