Is time then some part of movement? (Zeno[450]) calls it the interval
of movement; but the interval is not the same for all movements, even
if the latter were of similar nature; for movements that operate within
space may be swifter or slower. It is possible that the intervals of
the most rapid and of the slowest movement might be measured by some
third interval, which might far more reasonably be considered time. But
which of these three intervals shall be called time? Rather, which of
all the intervals, infinite in number as they are, shall time be? If
time be considered the interval of the regular movement, it will not be
the particular interval of every regular movement; otherwise, as there
are several regular movements, there would be several kinds of time. If
time be defined as the interval of movement of the universe, that is,
the interval contained within this movement, it will be nothing else
than this movement itself.