that is, that God was in Christ reconciling the world to Himself, not imputing their trespasses to them, and has committed to us the word of reconciliation.
2 Corinthians 5:19
Surrounding context
5:18 Now all things are of God, who has reconciled us to Himself through Jesus Christ, and has given us the ministry of reconciliation,
5:19 that is, that God was in Christ reconciling the world to Himself, not imputing their trespasses to them, and has committed to us the word of reconciliation.
5:20 Now then, we are ambassadors for Christ, as though God were pleading through us: we implore you on Christ's behalf, be reconciled to God.