Infinite number of octaves

[anagogy]

It must be considered that Source is evolving, too. It follows that as we evolve and add to the all, Source—the all—evolves.

So if Source is evolving, there would be no end point.

I don't think the Source evolves, the Source is infinite. Evolution seems more like a process of finite things reaching infinity by living close to infinity. I view the source as a comon higher self to all our higher selves.

I agree with you, Minyatur.  The ultimate source, as infinity, does not evolve.  It knows all, is all, and has all power.  It knows all probable paths of evolution, and this perfectly accurate knowing, which redounds to the very minutest depths of conceptualization, we confuse as our experience of reality.  All experiences are enfolded in the One.

Evolution is a valuable experience, not for what it will net us, but simply for the experience of evolution itself.  Growth is a very satisfying experience.

Source is like the mouth of the river of consciousness that has view of the whole system from the source to the river, and eventual return point.  Because of our identification with a specific place along the stream of consciousness, our perspective is limited to a certain specific place in the stream.  The perspective is much different from the source, which contains the perspective of the interrelated whole flow of consciousness.