2 Corinthians 5:18, 20

But all these things are from God, who reconciled us to Himself through Christ [making us acceptable to Him] and gave us the ministry of reconciliation [so that by our example we might bring others to Him]

So we are ambassadors for Christ, as though God were making His appeal through us; we [as Christ’s representatives] plead with you on behalf of Christ to be reconciled to God.