John 16:28 - Ellicott's Commentary On The Whole Bible

I came forth from the Father. — Comp. Note on John 16:19. He repeats with emphasis that which in the last verse He stated as believed by them — “It is true. I did come forth from the Father, and came into the world. But what follows from this? Heaven, and not earth, is My home. I leave the world again and return to the Father.” They had accepted the truth of the Incarnation, but in this there was already implied the truth of the Ascension, and in the truth of the Ascension there was implied the gift of the Paraclete, and the spiritual return and constant presence of Christ in the Church (John 16:7 and John 14:14-18).