320. But the truth that man is a microcosm, or little universe, because the created universe, viewed as to uses is, in image, a man, cannot come into the thought and from that into the knowledge of any one on earth from the idea of the universe as it is viewed in the spiritual world; and therefore it can be corroborated only by an angel, who is in the spiritual world, or by some one to whom it has been granted to be in that world, and to see things which are there. As this has been granted to me, I am able, from what I have seen there, to disclose this arcanum.