My thoughts on the email were as follows;
I remember as a child being told that no one can understand infinity. My grandfather was a protestant Minister, so I imagine that fit in with their belief system. But, I felt then that we are all part of the infinite and if you know yourself then you know the infinite. I still feel this way today. Yes, my calculator gives me an error if I divide 4/0 but I understand that there is an answer just not one that can be defined by our current understanding/knowledge.
It is human nature to try and explain the unknown and that is what makes us unique and also quite dangerous.
To me Buddha Nature is accepting that all things are divisible by zero and we are all part of infinity.
Today in my morning practice I was thinking about "Buddha Nature." When I returned to my computer I found this email from a friend of mine about the same topic. Vipāka? Perhaps. So, I thought I would share this with my Chess Sangha. I look forward to your comments and input as well.
I discovered what felt great about math around the same time as I discovered the Buddha Dharma. I fell out of love with math when being 16 collided with San Francisco and trigonometry all in the same time frame. But before trig, there were algebra and imaginary numbers.
Years later I learned that zero wasn't a numerical concept in Western civilization until its introduction by Moorish mathematicians, and recently I learned that the Maya had a zero concept even before the Arabs.
Infinity is something else again. Amida is almost a direct translation if infinite. Amida means without measure. Infinite means without limit.
So if I take zero as Buddha nature and infinity as Buddha, the puzzle of where I fit in is pretty well solved: Space junk, just like all other matter, subject to change, recombination, decay. Made up of absurdities, i.e. sub-sub-sub-sub (ad infinitum) atomic particles[?], whose existence is questionable.
Imaginary numbers are generated when you divide a number by zero. It can't be done in "real" life, but it can be done as a math problem. That was the most exciting thing about math for me. I guess I was too jaded to be turned on by zero. If I'm not mistaken, imaginary numbers are what led physicists to look for anti-matter.
Circling back to what this means to me, it is this: Certainty is a trap. Confusion and the impossibility of knowing are liberating. This is why I'm not terribly bothered by the use of Buddha Nature as a catch-all name for the inexplicable. It's not something you can bottle and sell. It's just a label for all the stuff we don't know. You could just as easily call it Dark Matter or Black Box or the Void. It wouldn't get you any closer to knowing what it is. But, like imaginary numbers, you know it's there, because the math is do-able, even if the results are impossible.