799. But the experience of life reveals yet another reality that also establishes as a fact that there exists more than just "movement". This reality consists of the fact that there is something we call "spirit". As "spirit" is really also "matter" or "movement" and thereby belongs to "X3", why is this "matter" defined as "spirit"? Here we once again have to turn back to the actual sense of the experience of life. This we sense as an "outside" and an "inside". When we sense or see the details of life, whether it be our surroundings, Nature, human beings, animals, plants or minerals or whether it be the details in our own organism, we perceive them and the matter they consist of as something that exists outside. We see them as more or less tangible realities. But if, having looked at them, we close our eyes, or in some other way cease to sense them any longer, we know that they have left in us an "impression". As long as we have perceived or seen things sufficiently, we can "remember" what they look like. This means that besides having ascertained the presence of the things in the room as tangible phenomena, we have also obtained a "copy" of them, so that we no longer need to have them in front of our senses as tangible realities in order to "see" them. But this "view" is not like the first one, an "outer experience", an "outer view". It is an "inner experience". This experience is like an "inner view". In this way absolutely every outer thing that our senses react to will leave behind a more or less perfect "inner copy". Gradually the living being will gather a whole collection of these copies, so many in fact that they constitute a perfect "reflection" of the entire outer, material world that its senses come into contact with. This inner "reflection" or these inner "copies" constitute the reality we call "spirit". We can therefore now understand that the living being's experience of life can exist only as a sense of "matter" and "spirit", which in turn means respectively an "outer" and an "inner" world.
      But this is to the highest degree proof that there does actually exist "something" within us, to which objects are therefore an "outer" and an "inner" world. If there were no such "something", for whom, and how, would things become a sense of "outer" and "inner" phenomena? Our very own sense of life is an irrefutable confirmation of our own highest "self" or "I" as the "experiencing something", and for whom the experience is the view of an "outer" and an "inner" world.