I'm quite sure that you believe this; but...
2 Corinthians 5:18-21
18 All this is from God, who through Christ reconciled us to himself and gave us the ministry of reconciliation; 19 that is, in Christ God was reconciling the world to himself, not counting their trespasses against them, and entrusting to us the message of reconciliation. 20 Therefore, we are ambassadors for Christ, God making his appeal through us. We implore you on behalf of Christ, be reconciled to God. 21 For our sake he made him to be sin who knew no sin, so that in him we might become the righteousness of God.
HMMMmmm...
Nothing about 'church' here.
Elsie:
Actually, that passage has lots of great Catholic Theology in it. The Apostles received a ministry of reconciliation [us] and of course Paul got this how, by being linked to the Peter, James, John and other Apostles and what exactly is the ministry of reconciliation, that it the Apostles are ambassadors for Christ [ambassador meaning like his representative or agents acting on his behalf, etc] and God is making an appeal through us [Apostles] we implore you on Christ behalf, etc.
Ties well to the ordained clergy and having the authority by Christ to forgive sins and reconcile in his name and because of him, that is God acts and works to make himself known through the Church. Lots of Catholic Ecclesiology and sacramental theology present in that passage you cited.