Bible Verses for Reference:
“Jesus said to him, I am the way, the truth, and the life: no man comes to the Father, but by Me. If you had known Me, you should have known My Father also: and from now on you know Him, and have seen Him” (Jhn 14:6–7).
“The words that I speak to you I speak not of Myself: but the Father that dwells in Me, He does the works. Believe Me that I am in the Father, and the Father in Me: or else believe Me for the very works’ sake” (Jhn 14:10–11)
Relevant Words of God:
To study such a thing is not difficult, but requires each of us to know this truth: He who is God’s incarnation shall hold the substance of God, and He who is God’s incarnation shall hold the expression of God. Since God becomes flesh, He shall bring forth the work He must do, and since God becomes flesh, He shall express what He is, and shall be able to bring the truth to man, bestow life upon man, and show man the way. Flesh that does not contain the substance of God is surely not the incarnate God; of this there is no doubt. To investigate whether it is God’s incarnate flesh, man must determine this from the disposition He expresses and the words He speaks. Which is to say, whether or not it is God’s incarnate flesh, and whether or not it is the true way, must be judged from His substance. And so, in determining[a] whether it is the flesh of God incarnate, the key is to pay attention to His substance (His work, His words, His disposition, and many more), rather than external appearance. If man sees only His external appearance, and overlooks His substance, then that shows the ignorance and naivety of man.
from Preface to The Word Appears in the Flesh