(_αα_) In Poseidon resides, as in Pontus and Oceanus, the might of the world-encircling sea, but his power and activity extends further. He built Ilium and was a shield of Athens. Generally he is revered as the founder of cities, in so far as the sea is the element of sea-faring, of commerce, and a bond between mankind. Apollo, in like manner, is the light of knowledge, of oracular speech, and preserves, moreover, a distant relation with Helios, as the natural light of the sun. Critics differ, no doubt--take Voss and Creuzer for examples--as to whether Apollo is referable to the sun. One may, however, in fact, assert that he both is and is not the sun, since he is not limited to its natural content, but is raised thereby to the significance of a spiritual import. It is impossible to escape the inevitable connection in which knowledge and light, the light of Nature and that of Spirit, if we regard their fundamental characteristics, stand relatively to one another. Light regarded as a element of Nature is that which manifests. Without our seeing Light itself it makes visible to us the illuminated objects around. By means of Light everything grows on the plane of contemplation for something else. Spirit, that is the free light of consciousness, knowledge, and cognition, possesses just the same character of manifestation. The distinction, apart from the differences of the respective spheres, in which these two modes of manifestation reveal themselves, consists simply in this, that Spirit reveals itself, and in that which it brings us, or which it assimilates as content[178], remains constant to itself. Light, however, does not make itself apprehensible to itself, but, on the contrary, makes that which is other and external to itself apprehensible; and though, no doubt, we may say this is done from its own resources, yet it cannot, as the Spirit can, once more retire into itself. For this reason it does not win the higher unity which finds itself constant by itself in another. Just as, then, light and knowledge are closely associated, we find in Apollo, as spiritual god, still a recollection of the light of the sun. For this reason Homer, for example, ascribes the plague in the camp of the Greeks to Apollo, which, in such a locality is in the summer solstice ascribable to the operation of the sun. We may add that his deadly arrows have unquestionably a symbolical reference to the solar rays. In the external representation it is external signs which more closely determine under what specific interpretation the god shall be mainly accepted.