A.T. Robertson Commentary John 18:4

"Jesus therefore, knowing all the things that were coming upon him, went forth, and saith unto them, Whom seek ye?" — John 18:4 (ASV)

Knowing all the things that were coming upon him (ειδως παντα τα ερχομενα επ' αυτον). Mentioned already in Joh 13:1. He was not taken by surprise. The surrender and death of Jesus were voluntary acts, though the guilt of Judas and the rest remains.