Are Sangha Officials ever explicit about "realms" etc. being mental, as opposed to supernatural?

With Sangha Officials I mean high ranking monks/nuns/etc, like Abbots. With "Realms" I mean stuff like "Other world" or "Pure lands", but I mean also stuff like the concept of "Rebirth". Is it ever explicitly taught or even mentioned that they are talking about mental or spiritual phenomena/states, as opposed to supernatural "literally heaven after literally the body is dead" type stuff?