Such a teleological unity, forever advancing to a consummation never entirely to be attained, demands however some sort of static "milieu" as well as some sort of static "material" in the midst of which and out of which it moulds its premeditated future. It is precisely this static "milieu" or "medium," and this static "material" or formless "objective mystery," which Bergson's philosophy, of the _"élan vital" of pure spirit_, spreading out into a totally indetermined future, denies and eliminates. In order to justify this double elimination--the elimination of an universal "medium" and the elimination of a formless "thing-in-itself"--Bergson is compelled to reduce _space_ to a quite secondary and merely logical conception and to substitute for our ordinary stream of time, measurable in terms of space, an altogether new conception of time, measurable in terms of feeling. When however we come to analyse this new Bergsonian time, or as he prefers to call it "intuitively-felt duration," we cannot avoid observing that it is merely a new "mysterious something" introduced into the midst of the system of things, in order to enable us to escape from those older traditional "mysterious somethings" which we have to recognize as the "immediate data" of human consciousness. It might be argued that Bergson's monistic "spirit," functioning in a mysterious indefinable "time," demands neither more nor less of an irrational act of faith than our mysterious psycho-material "soul" surrounded by a mysterious hyper-chemical "medium" and creating its future out of an inexplicable "objective mystery." Where however the philosophy of the complex vision has the advantage over the philosophy of the "élan vital" is in the fact that even on Bergson's own admission what the human consciousness most intensely _knows_ is not "pure spirit," whether shaped like a fan or shaped like a sheaf, but simply its own integral identity. And this integral identity of consciousness can only be visualized or felt in the mind itself under the form of a living concrete monad. It will be seen, however, when it comes to a "showing up" of what might be called the "trump cards" of axiomatic mystery, that the complex vision has in reality fewer of these ultimate irrational "data" than has the philosophy of the élan vital.