The image of the vine and the branches in John 15 gives us a powerful image of closeness both between ourselves and God and also with each other through our grounding in God.
Each of us is a branch connected to the vine which is Jesus. Jesus is telling us that the desires of each and every one of us must be rooted in His Desire, which is the same Desire as that of his heavenly Father. Between Jesus and his Father, there is no rivalry and Jesus does not enter into rivalry with us. From our side it tends to be a different story. We experience rivalry so constantly that it is very hard to imagine a relationship without rivalry. Just note how political and social debates are saturated with it.

Jesus’ words start to sound threatening when he talks about branches withering, being thrown away, and then burnt. However, it isn’t Jesus who cuts off the branches; it’s branches that cut themselves off. Life rooted in Christ has to be rooted in Christ. This is, or should be, a tautology, but we have a folk saying about cutting off the limb we’re sitting on. People who center their lives on one or more rivals instead of Christ are doing just that. Once cut off from the vine, we are consumed with rage with our rivals, a strife that burns us up.

We often think of union with God as individualistic but that is not so. On the contrary, union with the vine unites us with all of the other branches. This means we share our union with the vine with everybody else’s union with the vine. It is by being united to others through Christ that we have the ability, through grace, to act towards others in God’s Desire rather than through our rivalistic tendencies. Since there is no rivalry in Jesus, there is no way that Jesus would encourage rivalry with others who are connected to him. In his first epistle, John says that we should love one another because “love is from God” and God is love. (1 Jn. 4: : 7–8) Again, God’s love for us is deeply connected with our love for one another. God abides in us insofar as we love one another. If we cut ourselves off from God, we cut ourselves off from other people and if we cut ourselves off from other people, we cut ourselves off from God.

The image of the vine and the branches is, above all, Eucharistic. The Eucharist is a public event. The wine in the Eucharistic celebration is the blood of Jesus that he gave to heal all of us of our violent ways. The blood of Jesus on the altar shared with each of us makes present to us the death of Jesus at the hands of persecutory humans as it also makes present the risen life of Jesus. In exchange for the way we betray Jesus with our violence, we receive the gift of life through deep union with Jesus, a union like that of the branches to the vine. We associate blood with violence, such as with the term “bloodshed,” but blood is the life within us and it is life that the Risen Jesus gives us through his Blood. This is the wine, the blood, that flows from the vine to the branches to connect us to Christ and to each other.