John 14:11

“Believe me that I am in the Father, and the Father in me, or else believe me for the very works' sake.”

Jesus now repeats what He has said in John 10:38. He longs that they may look at Him and consider His life and recognise His uniqueness as the One Who is the abode of the Father, recognise that He fully and actually represents the Father distinctively and completely, and that because They are in such unity that when One acts the Other is acting. But if the disciples are not quite there yet, let them rather contemplate His works and let His works speak for Him. For while that is not finally sufficient, it is a beginning. What is important is that they should step over the line from saying, ‘Master', to saying ‘My Lord and My God' (John 20:28).

It is quite evident that by ‘the Father in me and I in the Father' He was here intending to indicate His own unique Oneness with the Father (compare John 10:30; John 10:38), for the whole context demands it. No one else could have said these words with this significance, nor can. It is true that later He can say that the Father is in His disciples (John 14:23), and that we can claim to be ‘in Him', but it is obvious from the context that what He says here is in a different sense from that. He never suggests that when people see the disciples they actually see the Father. His disciples may become the dwelling place of the Father through the activity of Jesus and His Spirit, (and thus spiritually), and as a result reveal something of the Father, but in the case of Jesus the oneness is such a permanent and essential reality that to see Him is to see the fullness of God, something revealed by His works which only God could do.