+Jn 13: 16-20
Amen, amen, I say to you, no slave is greater than his master nor any messenger greater than the one who sent him.
If you understand this, blessed are you if you do it.
I am not speaking of all of you. I know those whom I have chosen. But so that the scripture might be fulfilled, ‘The one who ate my food has raised his heel against me.’
From now on I am telling you before it happens, so that when it happens you may believe that I AM.
Amen, amen, I say to you, whoever receives the one I send receives me, and whoever receives me receives the one who sent me.”
The New American Bible
The Catechism of the Catholic Church
The Apostles’ mission
858 Jesus is the Father’s Emissary. From the beginning of his ministry, he “called to him those whom he desired; . . . . And he appointed twelve, whom also he named apostles, to be with him, and to be sent out to preach.” From then on, they would also be his “emissaries” (Greek apostoloi). In them, Christ continues his own mission: “As the Father has sent me, even so I send you.” The apostles’ ministry is the continuation of his mission; Jesus said to the Twelve: “he who receives you receives me.”
859 Jesus unites them to the mission he received from the Father. As “the Son can do nothing of his own accord,” but receives everything from the Father who sent him, so those whom Jesus sends can do nothing apart from him, from whom they received both the mandate for their mission and the power to carry it out. Christ’s apostles knew that they were called by God as “ministers of a new covenant,” “servants of God,” “ambassadors for Christ,” “servants of Christ and stewards of the mysteries of God.”
860 In the office of the apostles there is one aspect that cannot be transmitted: to be the chosen witnesses of the Lord’s Resurrection and so the foundation stones of the Church. But their office also has a permanent aspect. Christ promised to remain with them always. The divine mission entrusted by Jesus to them “will continue to the end of time, since the Gospel they handed on is the lasting source of all life for the Church. Therefore, . . . the apostles took care to appoint successors.”