[jonaustin]

This idea is called the Perennial Philosophy: https://en.wikipedia.org/wiki/Perennial_philosophy

Aldous Huxley wrote a book about it: https://en.wikipedia.org/wiki/The_Perennial_Philosophy

[codemonkey-zeta]

Brilliant! Thank you for pointing this out, I was unaware of this notion. From the first link,

> "In the early 19th century the Transcendentalists propagated the idea of a metaphysical Truth and universalism"

So it seems it was not a coincidence Emerson stuck out to me when I first read him (Emerson was a foundational Transcendentalist).