He's spoken about it in a number of forums, take your pick: http://righteousmind.com/viewpoint-diversity/ (near the bottom).

Here's the one I referenced: http://heterodoxacademy.org/2016/10/21/one-telos-truth-or-so...

Telos, incidentally, I consider to be a very fascinating and important concept, though only tangentially relevant to this thread.