In assuring the disciples of the blessings that would follow his return to the Father (see John 14:12), Jesus had not specifically mentioned the Holy Spirit. Now he explained. When he returned to the Father, he would send the Holy Spirit as the Counsellor, or Helper, to guide, instruct and strengthen them. Those who did not believe in Jesus would not be able to understand how this Helper worked, because their understanding was limited to the things of the world in which they lived (John 14:15-17). Soon Jesus would leave the world, but he would not desert his disciples. Although people in general would see him no longer, his disciples would, in a sense, continue to see him. They would see and know him spiritually, because he would live within them. He would love them, and in return they would love him (John 14:18- 21).
Judas Thaddaeus (not Judas the betrayer), still thinking of Jesus’ physical body, could not understand how the disciples would see him but others would not. Jesus replied that not only the Son, but the Father also, would live with them, provided they gave proof of their love for him by following his teachings. The Holy Spirit would help them recall those teachings (John 14:22-26).
Jesus saw that his disciples were confused and unsettled, and promised them his peace. By this he did not mean a life free from trouble, but an inward calm such as he had. Though outwardly afflicted,
inwardly he had peace. The disciples should not have been troubled about Jesus’ coming death, but glad that by that death he was bringing to completion the work his Father had given him to do (John 14:27-29). Though sinless and in no way under Satan’s power, Jesus would allow Satan’s servants to betray and kill him, so that through his death he might fulfil his Father’s will and save sinners (John 14:30-31).