That may be a fallacy of composition - what's true of a part or a component needn't be true of the whole. For example, your cells divide, they are part of you, but you do not divide.
> Or, at the very least, I cannot be entirely indivisible, since cells are part of me and they are dividing.
The point is more that the universe must have the capacity for consciousness within it's inner-workings, much like divisibility must be inherent in any biological system -- more so than "cells" being divisibile -- we're after the notion of divisibility itself.