Even in delivering Christ to be crucified, Satan serves God’s purpose. When Jesus refers to the “prince of this world”, that’s Satan. Earlier, Satan had entered Judas and influenced this whole betrayal thing (John 13). Understand that Jesus is choosing to be crucified. Jesus was not powerless, but He allowed Himself to be betrayed and delivered into the custody that would ultimately pave the way to His crucifixion. He did this to accomplish His Father’s will, and to save us. The stage had been set, and Satan escorted Christ right to the cross where the victory was won.