As becoming is the foundation of the become, continuous living history that of fulfilled dead nature, the organic that of the mechanical, destiny that of causal law and the causally-settled, so too _direction is the origin of extension. The secret of Life accomplishing itself which is touched upon by the word Time forms the foundation of that which, as accomplished, is understood by_ (or rather _indicated to an inner feeling in us by_) _the word Space_. Every extension that is actual has first been accomplished in and with an experience of depth, and what is primarily indicated by the word Time is just this process of extending, first sensuously (in the main, visually) and only later intellectually, into depth and distance, i.e., the _step_ from the planar semi-impression to the macrocosmically ordered world-picture with its mysterious-manifest kinesis. We feel—and the feeling is what constitutes the state of all-round awareness in us—that we are _in_ an extension that encircles us; and it is only necessary to follow out this original impression that we have of the worldly to see that in reality there is only one true “dimension” of space, which is direction from one’s self outwards into the distance, the “there” and the future, and that the abstract system of three dimensions is a mechanical representation and not a fact of life. By the depth-experience sensation is _expanded_ into the world. We have seen already that the directedness that is in life wears the badge of _irreversibility_, and there is something of this same hall-mark of Time in our instinctive tendency to feel the depth that is in the world uni-directionally also—viz., from ourselves outwards, and never from the horizon inwards. The bodily mobility of man and beast is disposed in this sense. We move _forward_— towards the Future, nearing with every step not merely our aim but our old age—and we feel every _backward_ look as a glance at something that is past, that has already become history.[185] If we can describe the basic form of the understood, viz., causality, as _destiny become rigid_, we may similarly speak of spatial depth as a _time become rigid_. That which not only man but even the beast _feels_ operative around him as destiny, he _perceives_ by touching, looking, listening, scenting as movement, and under his intense scrutiny it stiffens and becomes causal. We _feel_ that it is drawing towards spring and we feel in advance how the spring landscape expands around us; but we _know_ that the earth as it moves in space revolves and that the duration of spring consists of ninety such revolutions of the earth, or days. Time gives birth to Space, but Space gives death to Time.