John 15:26-27 But when the Comforter is come, whom I will send unto you from the Father, even the Spirit of truth, which proceed from the Father, he shall testify of me: And you also shall bear witness, because you have been with me from the beginning.
The 37th New Testament prophecy in John that is fulfilled in Acts 2:1-4 when they and others (120 Acts 1:15) were baptized with the Holy Spirit and with fire.
‘I will send unto you from the Father, even the Spirit of truth’ Jesus is the baptizer in the Holy Spirit (Matt. 3:11; John 1:31-33).
‘Proceed from the Father’ the Father will send forth in Jesus name or by His authority (John 14:26).
‘He shall testify of me’ The Holy Spirit bears witness by anointing men: for the Apostles who were to preach the gospel (Luke 4:18; Acts 2:11-39; 1Cor. 1:17-18, 23; 2:1-16). In prophesying by edifying, exhorting and comforting (Acts 3:21; 13:1, 32; 21:10; 1Cor. 12:10, 28; 14:3). In the exercise of other gifts (1Cor. 12:10, 30; 14:5, 13, 27). In making audible intercession with groanings which cannot be uttered in words (Rom. 8:26). He will teach us all the words that Christ spoke, therefore He is called the Spirit of truth, He will guide us into all truth [the Word]. He will not speak of Himself; but whatsoever He shall hear of Christ He will speak and show the Apostles the things to come. He shall glorify Jesus Christ for He shall receive of Him, and show it all unto us (John 16:13-14).
‘You also shall bear witness’ The disciples also were to speak for Jesus (Acts 1:8, 22) so that others may know Him (Isa. 43:10) and believe in Him and may understand that He is the Messiah, the Saviour of the world. They shall witness that He is God (Isa. 43:12).