[249] NOR sociology, ^abut something which PRECEDES all this and shows how the human mind, in his encounter with reality, has created these abstract realms and why it has created them and HAD to create them. Now here I can DEFEND the Greeks who left their country, in the Iliad, and went to the conquest of Asia Minor---namely the reason was that without such abstractions, you cannot grasp the elements which CAN be abstracted. This was the reason, and for this reason we must PRAISE not only the Homeric^b Iliad and the action of the colonizing Greeks, of which they are an epic expression, but we must also praise the human mind which went out to find his world and could find it only by the method of producing abstractions and abstract realms. In this way he COULD develop physics, ^che COULD develop biology, he COULD develop PSYCHOLOGY^d even---although here the limits became mostly stronger than the advantages---he COULD develop sociology. ^eAnd he HAS, and we have an immense knowledge about the abstract realms in our encounter with reality. But we have lost one thing: WE HAVE LOST THE UNITY, because man, when he identified himself with one or all of these levels, lost what makes man, namely that being which is able to ASK these questions, to DEVELOP these abstractions, to conquer the world with the HELP of these abstractions. All this was lost. And THEREFORE: man had no knowledge of himself any more except the practically immediate knowledge which he always has, out of which he lives. But the fact