大乘入道次第開決 1.175

1.175

正等菩提廣大深遠者。無上菩提不過福智。約福名廣。無邊際故。約智名深。難測知故。或大菩提即是理智。智無限極故名廣大。理無思議故名深遠。

Regarding "Right and equal bodhi is vast and profound": Unexcelled bodhi is nothing other than merit and wisdom. In terms of merit, it is called "vast," because it has no boundaries. In terms of wisdom, it is called "profound," because it is difficult to fathom. Alternatively, great bodhi is simply principle and wisdom: wisdom is limitless, hence called "vast"; principle is inconceivable, hence called "profound."