"When the work which the Father gave the Son to do on earth was accomplished, the Holy Spirit was sent on the day of Pentecost in order that he might continually sanctify the Church." 174 Then "the Church was openly displayed to the crowds and the spread of the Gospel among the nations, through preaching, was begun." 175 As the "convocation" of all men for salvation, the Church in her very nature is missionary, sent by Christ to all the nations to make Disciples of them. 176

From the beginning, Jesus associated his Disciples with his own life, revealed the mystery of the Kingdom to them, and gave them a share in his mission, joy, and sufferings. 215 Jesus spoke of a still more intimate communion between him and those who would follow him: "Abide in me, and I in you.... I am the vine, you are the branches." 216 and he proclaimed a mysterious and real communion between his own body and ours: "He who eats my flesh and drinks my blood abides in me, and I in him." 217