TIME IS MEASURED BY MOVEMENT, AND IN THAT SENSE IT IS THE MEASURE OF MOVEMENT.
12. (13). The revolution of the universal Sphere leads us therefore to the recognition of time, within which it occurs. Not only is time that in which (all things "become," that is, grow), but time has to be what it is even before all things, being that within which everything moves, or rests with order and uniformity. This is discovered and manifested to our intelligence, but not produced by regular movement and rest, especially by movement. Better than rest, indeed, does movement lead us to a conception of time, and it is either to appreciate the duration of movement than that of rest. That is what led philosophers to define time as the measure "of" movement, instead of saying, what probably lay within their intention, that time is measured "by" movement. Above all, we must not consider that definition as adequate, adding to it that which the measured entity is in itself, not limiting ourselves to express what applies to it only incidentally. Neither did we ever discern that such was their meaning, and we were unable to understand their teachings as they evidently posited the measure in the measured entity. No doubt that which hindered us from understanding them was that they were addressing their teachings to learned (thinkers), or well prepared listeners, and therefore, in their writings, they failed to explain the nature of time considered in itself, whether it be measure or something measured.