+Jn 20: 19-23
On the evening of that first day of the week, when the doors were locked, where the disciples were, for fear of the Jews, Jesus came and stood in their midst and said to them, “Peace be with you.”
When he had said this, he showed them his hands and his side. The disciples rejoiced when they saw the Lord.
(Jesus) said to them again, “Peace be with you. As the Father has sent me, so I send you.”
And when he had said this, he breathed on them and said to them, “Receive the holy Spirit.
Whose sins you forgive are forgiven them, and whose sins you retain are retained.”
The New American Bible
The Catechism of the Catholic Church
. . . from the time of the Church of the Apostles . . .
1086 “Accordingly, just as Christ was sent by the Father so also he sent the apostles, filled with the Holy Spirit. This he did so that they might preach the Gospel to every creature and proclaim that the Son of God by his death and resurrection had freed us from the power of Satan and from death and brought us into the Kingdom of his Father. But he also willed that the work of salvation which they preached should be set in train through the sacrifice and sacraments, around which the entire liturgical life revolves.”
1087 Thus the risen Christ, by giving the Holy Spirit to the apostles, entrusted to them his power of sanctifying: they became sacramental signs of Christ. By the power of the same Holy Spirit they entrusted this power to their successors. This “apostolic succession” structures the whole liturgical life of the Church and is itself sacramental, handed on by the sacrament of Holy Orders.