When one observes keenly the nature of this life of variety, one finds that behind the world of variety there is one life, the source and goal of all things. It is that life which may be called the blood of the universe circulating through the veins of the universe. It is substance or spirit or life: something out of which all that is seen and all intelligence is molded, kept alive and in working order. It is this life which is so to speak the veins of the universe and we know it as what we term intelligence.