John 14:28
You heard me say to you, 'I am going away, and I am coming back to you.' If you loved me, you would rejoice that I am going to the Father, because the Father is greater than I — this is the hardest statement in the discourse: the Father is greater than Jesus. This appears to undermine Jesus' divinity, yet its meaning is precise: in his incarnate state, Jesus has freely chosen to limit his divine prerogatives and place himself in obedience to the Father's will. The disciples are called to rejoice in this subordination because it is the expression of Jesus' love—he goes to the Father to complete the work of redemption and to prepare the way for the disciples.