New Defender's Study Bible Notes
14:16 another Comforter. The “Comforter” (Greek parakletos, meaning “called alongside”) is, of course, the Holy Spirit, the third person of the Triune Godhead. Although He is mentioned in many ways in the Old Testament (first of all, as the Energizer of the physical creation, Genesis 1:2), and also in the earlier chapters of the four gospels, this is the first explicit promise that He would be coming to be with the believer, taking the place of the Son, who would be returning to the Father. Having taken a human body, the Son cannot be omnipresent, but the Spirit is omnipresent, and thus Christ can continue to be with each believer through His Holy Spirit.