Oh, I didn't mean those question in relation to "the unmovable I" but to the "manifested movement". That is, how the seeming duality arises and why? The actual technical "how" seems to be in the realm of eternal mystery ("miracle"), but that's moot. On the other hand, "why" can be sort of described at least from the human perspective -- to experience connection and interaction with an other, to experience myself, because play is fun, etc. But all of that is just a raw fact being its own reason for being, which renders it moot, too.

Naturally, all questions about "the unmovable I" that go beyond who or what are completely irrelevant as they simply don't apply.