To be a true disciple of Jesus, it is not enough to make a verbal proclamation of faith in him. One is also required to keep his commandments. It is important to note here that one does not earn Jesus’ love by keeping his command to love. It is because one has already experienced that love that one wants to love and obey in return.
Judas (not Iscariot) does not appear in any of the Synoptic Gospels. He is the one who misunderstands here and asks a question about the revelation that Jesus is to make, not realizing that the revelation has been made already. If the disciples want to continue to experience the love that Jesus has made manifest to the world, they must continue to love one another. It is in the love of one another that they will experience the love of God and Jesus. This will result in a mutual indwelling. Just as Jesus dwells in the Father and the Father in him, so Jesus and the Father will live in the disciples and the disciples in them. This abiding presence of God and Jesus within the disciples as a community is both the foundation and the result of love expressed in deeds. Where there is no love shown, Jesus and the Father cannot be made present.
Though Jesus has made explicit what the disciples are to do if they are to make him present, it is possible that they may not have grasped all the implications of the command. The Paraclete or Advocate, only here in John identified with the Holy Spirit, will “remind” them of Jesus’ teachings. This clearly indicates that the Holy Spirit will not give new or different teaching, but only reinforce all that Jesus has already taught. The Spirit will be sent in Jesus’ name and so, like Jesus was the exegesis of the Father, the Spirit will be the exegesis of Jesus.
To keep the words of Jesus means to live them out in action. The ones who do that have already experienced the indwelling of God and Jesus in them. This indwelling will strengthen them and enable them to live out the word more fully each day. This is not a linear but cyclic process. More living out means more indwelling and more indwelling means more living out.