John the Apostle
John 16:13WEB·traditional attribution

However when he, the Spirit of truth, has come, he will guide you into all truth, for he will not speak from himself; but whatever he hears, he will speak. He will declare to you things that are coming.

John Calvin Reformed

13. But when he is come, the Spirit of truth. The Spirit, whom Christ promised to the apostles, is declared to be perfect Master or Teacher “Maistre ou Docteur.” of truth And why was he promised, but that they might deliver from hand to hand the wisdom which they had received from him?

Albert Barnes Presbyterian

Verse 13. The Spirit of truth. So called because he would teach them all needful truth. Will guide you into all truth. That is, truth which pertained to the establishment of the Christian system, which they were not then prepared to hear.

William Gurnall Puritan

First, It is the gospel alone that presents the Spirit of God as a comforter to poor sinners. Indeed the comforting office of the Spirit is founded on the satisfaction of Jesus Christ. When Christ had shed his blood, and in it laid down upon the nail the full price of a sinner's peace with (iod ; then at his return to heaven he prays...

Commenting on Ephesians 6:10-20