John 14:26

But the Comforter Better, But the Advocate (see on John 14:16).

which is the Holy Ghost Even the Holy Spirit. The epithet -holy" is given to the Spirit thrice in this Gospel; John 1:33; John 20:22, and here (in John 7:39 the -holy" is very doubtful). It is not frequent in any Gospel but the third; five times in S. Matthew, four in S. Mark, twelve in S. Luke. S. Luke seems fond of the expression, which he uses about forty times in the Acts; and he rarely speaks of the Spirit without prefixing the -holy." Here only does S. John give the full phrase, both substantive and epithet having the article: in John 1:33 and John 20:22 there is no article.

in my name As My representative, taking My place and continuing My work (see on John 14:13). -He shall not speak of Himself … He shall receive of Mine and shew it unto you" (John 16:13-14). The mission of the Paraclete in reference to the glorified Redeemer, is analogous to the mission of the Messiah in reference to the Father.

shall teach you all things i.e. -guide you into all the truth" (John 16:13). He shall teach them the Divine truth in its fulness; all those things which they -cannot bear now," and also -things to come."

bring all things to your remembrance Not merely the words of Christ, a particular in which this Gospel is a striking fulfilment of this promise, but also the meaning of them, which the Apostles often failed to see at the time: comp. John 2:22; John 12:16; Luke 9:45; Luke 18:34; Luke 24:8. "It is on the fulfilment of this promise to the Apostles, that their sufficiency as Witnesses of all that the Lord did and taught, and consequently the authenticity of the Gospel narrative, is grounded" (Alford).