2 Corinthians 5:17, 19-20

Therefore if anyone is in Christ [that is, grafted in, joined to Him by faith in Him as Savior], he is a new creature [reborn and renewed by the Holy Spirit]; the old things [the previous moral and spiritual condition] have passed away. Behold, new things have come [because spiritual awakening brings a new life].

that is, that God was in Christ reconciling the world to Himself, not counting people’s sins against them [but canceling them]. And He has committed to us the message of reconciliation [that is, restoration to favor with God]. 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.