ABSTRACT
Man's capacity to think is his most outstanding attribute. Whoever speaks of man will therefore have to speak at some stage of human knowledge. Man must try for ever to discover knowledge that will stand up by itself, objectively, but the moment he reflects on his own knowledge he catches himself red-handed in the act of upholding his knowledge. He finds himself asserting it to be true, and this asserting and believing is an action which makes an addition to the world on which his knowledge bears. In order to bring out the logical characteristics of such tacit knowledge we must compare it with the articulate knowledge possessed by man. Such critical examination of the map is possible for two reasons. First, because a map is a thing external to us and not something we are ourselves doing or shaping, and second, because even though it is merely an external object, it can yet speak to us.
