Jesus Mission was to redeem us
"This is a trustworthy saying, and everyone should accept it: “Christ Jesus came into the world to save sinners”–1 Timothy 1:15
The angel said of Mary, “And she shall bring forth a Son, and you shall call His name Jesus, for He will save His people from their sins” (Matthew 1:21). Jesus told Zacchaeus, “For the Son of man has come to seek and to save that which was lost” (Luke 19:10)
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The entire mission of the Son and the Holy Spirit, in the fullness of time, is contained in this: that the Son is the one anointed by the Father’s Spirit since his Incarnation - Jesus is the Christ, the Messiah.
Everything in the second chapter of the Creed is to be read in this light. Christ’s whole work is in fact a joint mission of the Son and the Holy Spirit. Here, we shall mention only what has to do with Jesus’ promise of the Holy Spirit and the gift of him by the glorified Lord.
Holy **Spirit and the Church **
737 The mission of Christ and the Holy Spirit
is brought to completion in the Church, which is the Body of Christ and the Temple of the Holy Spirit. This joint mission henceforth brings Christ’s faithful to share in his communion with the Father in the Holy Spirit. The Spirit prepares men and goes out to them with his grace, in order to draw them to Christ. The Spirit manifests the risen Lord to them, recalls his word to them and opens their minds to the understanding of his Death and Resurrection. He makes present the mystery of Christ, supremely in the Eucharist, in order to reconcile them, to bring them into communion with God, that they may “bear much fruit.”[132] 738 Thus the Church’s mission is not an addition to that of Christ and the Holy Spirit, but is its sacrament: in her whole being and in all her members, the Church is sent to announce, bear witness, make present, and spread the mystery of the communion of the Holy Trinity …
739 Because the Holy Spirit is the anointing of Christ, it is Christ who, as the head of the Body, pours out the Spirit among his members to nourish, heal, and organize them in their mutual functions, to give them life, send them to bear witness, and associate them to his self-offering to the Father and to his intercession for the whole world. Through the Church’s sacraments, Christ communicates his Holy and sanctifying Spirit to the members of his Body.