You've got to admit that "Immanentize the eschaton" is a great phrase. I ran into it first through Robert Anton Wilson which I'd bet is typical of HN readers who know it. But mostly I'm finishing up The House of Government so the issue is quite on my mind.

Just for the sake of sharing what no one has ever been interested in hearing, Voeglin traced the concept of the "third age that will never end" back to Joachim of Flora's writings... and from what Wikipedia tells me, you likely know that already from reading Wilson!

I think Robert Anton Wilson is the source of almost everyone familiar with the phrase at this point. But I think when RAW used it it was a less obscure reference than now.

It does stick with you.