四明十義書 1.25

1.25

據此所釋廣明十種三法之後，須有觀心一科，不可輒廢。《發揮》之義於茲已壞矣。

Based on what is explained here, after broadly clarifying the ten kinds of threefold dharmas, there must be a section on contemplating the mind; it cannot be abolished rashly. The thesis of the *Fahui* was already destroyed by this.