Each of these passages is a revelation of what is actually true (but only eluded to).
Jesus' explanation: "The wind blows where it wishes, and you hear the sound of it, but cannot tell where it comes from and where it goes. So is everyone who is born of the Spirit" (John 3:8), answers the question, and yet it is not fully understood.
What all of this points to or reveals, is simply the defining points of the difference between God who is spirit, and mankind (including Jesus). Mankind manifest in the form of flesh and blood--or "in the image of God"--are rather those things--things of this world...and not the spirit of God or God per se--because they are visible to the flesh. In other words, the statement by Jesus then, is a way of saying "No one has yet seen as God sees--as God who sees all whether flesh and blood, or of the elements of this world, or by image, and also everything spirit."
Which is not to say that Jesus is not God--but rather that no image is God--God is not a mere image. In the case of Jesus--He was and is in fact more--more than an image, more than flesh and blood, and more than spirit. Not more than God, but every bit both God and man, God and the image of God.