The great eternal plan of God is established. God – Father, Son, and Holy Spirit – determined in eternity – “before time began, before the foundation of the world” – that the Father would send the Son and the Son would send the Spirit into the world they would create together.
The Father would love the world so much that He would give “His only begotten Son” so that “whoever believes in Him should not perish but have everlasting life” (John 3:15).
The Son would “glorify” the Father on the earth by finishing “the work” which the Father had given Him to do (John 17:1-5), which was to die on the Cross and rise from the dead.
The Holy Spirit would convict the world “of sin, and of righteousness, and of judgment” and would guide the Son’s disciples “into all truth.” The Spirit would not “speak on His own authority,” but would speak “whatever He hears” and would tell the followers of the Son “things to come.” The Spirit of God would “glorify” the Son by declaring to the followers what belonged to the Son and the Father (John 16:5-15).