Hello Steve,
"Who am I?" - looking at that question the Zen way is one option; Zen can be rather fuzzy. But you can also look at it cool-headed, and yes, "logically". When there is an Unlimited Force, giving rise to this Universe (and probably many other Universes), which is an assumption, than any limitation arising from that Force also IS THAT FORCE, albeit with the limitations of being limited. A drop from the ocean is still ocean. So I did not need a koan to answer that question - it was pure logic: if there is a Creative Force, then I am that creative force. I have to admit I got a hint from Eckhart Tolle, who said:" You are Consciousness, underlying all Form". Some people approach this from the quantum-field angle, but I suspect that quantum physics ultimately can only work within the 'material' realm. One may have to search beyond that level, a terrain as yet untrodden by science. An interesting window can be NDEs, Near Death Experiences. I know that the medical establishment is not fond of those, too unscientific. I don't know what the church has done with it in the past; I suspect rejection, because too threatening. But there are tens of thousands NDEs, from all over the world, and they are worthwhile to take notion of. A particularly lucid NDE is described in Anita Moorjani's "Dying to be me". Has NDE already be subject of a Forum? If not, it might be interesting to start one.