780. A "movement" can be measured or established only in relation to a "fixed point". And it is in reality this "measuring of movement" that is the most profound analysis of every experience or sensory perception. What is sensory perception other than an establishment of a certain kind of "movement"? The "measurements" may not always be registered in numbers, but the principle is the same. When we say that something is "green", "yellow" or "blue", the most profound analysis of these expressions is that they are simply indications of types of "movement" or "vibration". Exactly the same applies in the case of phenomena that we express as "dense" or "porous". Everything that exists as sensory impressions can exist only as expressions of certain combinations of "movement", which are in turn thereby in reality the same as degrees or measurements of types of "movement" or "vibration".
      We have therefore come to an area wherein lies the boundary between the "fixed" and the "moveable", between the "visible" and the "invisible", between the "created" and the "non-created", and thereby to the boundary between the "creator" and the "created". And it will not be difficult for the practised and advanced researcher to see that the I is the "fixed point", whereas "material" is what is visible and moveable. It is the contrast to the I or the "fixed point". "Movement" on the other hand constitutes the connecting link or binding material between these two factors. Here we are therefore close to the innermost source or fount of life.