I only ask because you seem to be using this term enlightenment as though it has a single meaning, when at least on the surface, the various figures who have declared themselves enlightened teachers tend to disagree with other enlightened teachers, and their respective directed pointings. That said, there is considerable overlap, more than is sometimes recognized among the scholars (who are, often, also widely considered to be enlightened). And of course Huxley, though I am sure he would not describe himself as enlightened, was certainly no slouch in terms of his scholarly acumen, and he coined the very term “perennial philosophy”.