瑜伽論記 10.465

10.465

言聞說種種最極廣大者，是盡所有性即俗諦境。最極甚深者，是如所有性即勝義諦境，不思議成前俗境，不度成勝義境。

The words "hearing the explanation of the various supremely vast [teachings]" refers to the nature of the extent [of things], which is the object of conventional truth. "Supremely profound" refers to the nature of how [things] exist, which is the object of ultimate truth. Inconceivability accomplishes the former conventional object; being beyond measurement accomplishes the ultimate object.