The Logos was equal to the metal gold - incorruptible and pure - yet material and visible. Logos is also equated with golden light phenomenon for the same reason. The Logos of the human being rises out of the lower nature as uncorrupted Gold and Light as this is his subtle light body and this body is nourished and fed by even higher and more subtle light bodies. So the soul was not considered as a Logos, but what came from it was - and as a like nature to the same Golden Spirit that arises out of everything with a soul and spirit. So the Sun is considered the abode of the logos and the logoi journey there from everywhere. As the light inspires the growth, so the light goes back and forth to all the spheres of existence.