It has existed for uncounted aeons - for millennia - it has always existed and will always exist, and yet its existence is bound too in linear time and place at points. It is a paradox, perhaps.
It is a weight in the Force, a single echoing demand, and as the Force has no beginning nor end, no coordinates it can be found at, neither does it.
(It was human, once, to the extent that it has a meaningful past. It is human, and it's a human's iron will that shaped its demand. (It remembers humanity in many ways, though it is so much more.))
There are some places, though, that the Force-as-it-is does not fully affect. Where the echo of its demand is weak, and it cannot pull on the threads of reality with quite as much strength.
But there's a tug, now, a demand echoing from one of those quiet places, a channel opened, a chance to boost its signal -