+Jn 15: 1-8
“I am the true vine, and my Father is the vine grower.
He takes away every branch in me that does not bear fruit, and everyone that does he prunes so that it bears more fruit.
You are already pruned because of the word that I spoke to you.
Remain in me, as I remain in you. Just as a branch cannot bear fruit on its own unless it remains on the vine, so neither can you unless you remain in me.
I am the vine, you are the branches. Whoever remains in me and I in him will bear much fruit, because without me you can do nothing.
Anyone who does not remain in me will be thrown out like a branch and wither; people will gather them and throw them into a fire and they will be burned.
If you remain in me and my words remain in you, ask for whatever you want and it will be done for you.
By this is my Father glorified, that you bear much fruit and become my disciples.
The New American Bible
The Catechism of the Catholic Church
The communion of the Holy Spirit
1108 In every liturgical action the Holy Spirit is sent in order to bring us into communion with Christ and so to form his Body. The Holy Spirit is like the sap of the Father’s vine which bears fruit on its branches. The most intimate cooperation of the Holy Spirit and the Church is achieved in the liturgy. The Spirit who is the Spirit of communion, abides indefectibly in the Church. For this reason the Church is the great sacrament of divine communion which gathers God’s scattered children together. Communion with the Holy Trinity and fraternal communion are inseparably the fruit of the Spirit in the liturgy.
1109 The epiclesis is also a prayer for the full effect of the assembly’s communion with the mystery of Christ. “The grace of the Lord Jesus Christ and the love of God and the fellowship of the Holy Spirit” have to remain with us always and bear fruit beyond the Eucharistic celebration. The Church therefore asks the Father to send the Holy Spirit to make the lives of the faithful a living sacrifice to God by their spiritual transformation into the image of Christ, by concern for the Church’s unity, and by taking part in her mission through the witness and service of charity.