John 16:13-15 note 1
131 The work of the Spirit is, first, to convict the world. Second, as the Spirit of reality He guides the believers into all the reality; that is, He makes all that the Son is and has real to the believers. All that the Father is and has is embodied in the Son (Col. 2:9), and all that the Son is and has is declared as reality to the believers through the Spirit (vv. 14-15). This declaring is the glorifying of the Son with the Father. Hence, it is a matter of the Triune God being wrought into and mingled with the believers. Third, the Spirit declares the things that are to come, which are revealed mainly in Revelation (Rev. 1:1, 19). The three aspects of the Spirit's work correspond with the three sections of John's writings: his Gospel, his Epistles, and his Revelation.