2 Corinthians 5:20

‘We are ambassadors therefore on behalf of Christ, as though God were entreating by us: we plead on behalf of Christ, be you reconciled to God.'

‘Therefore', because a way of reconciliation has been made possible, we who are His, and reconciled already to Him, have a responsibility as ‘ambassadors', as those sent to represent Him, bearing His authority. We go on behalf of Christ, just as though God was entreating through us, and our message is, ‘We plead, on Christ's behalf, be reconciled to God.' Our ministry is a ministry of reconciliation. Not a reconciliation between man and man, although that will follow, but a reconciliation with God. And Paul is making clear that he himself is such an appointed ambassador.

This ‘plea' is not a plea in weakness. It carries behind it an implied threat. Peace has been offered. An amnesty is available. But if they are not willing to truly believe and be reconciled they must bear the consequences.

This may be seen as simply a general description of what his message and purpose is all about, that as God's ambassador his is a ministry offering reconciliation with God to the world, as God entreats through him, or as a specific plea to certain of the Corinthians, whom he perceives by their behaviour to be in a doubtful position, to make sure of where they are with regard to God (compare 2 Corinthians 6:1; 2 Corinthians 13:5).