四分律行事鈔資持記 2.195

2.195

引證，即是《成論》，初二句推末歸本。下二句明捨本無末。問：今論作體，為是心王，為意思耶？答：前云業思，何須疑問。若觀論文，三業皆心；離心無思之語，似指心王。然而王數體用以分，由體起用，用即是體；今論作業，就用為言。故《業疏》云：言心未必是思，言思其必是心，宜細詳之。

Citing proof: this is from the Tattvasiddhi-śāstra. The first two lines trace the branches back to the root. The lower two lines clarify that abandoning the root leaves no branches. Question: In the present treatise on the essence of action, is it the mind-king or the mental factor of volition? Answer: Earlier it said "karmic volition"; why is there any need to doubt? If one examines the text of the treatise, the three karmas are all mind; the statement "apart from mind there is no volition" seems to point to the mind-king. However, the king and the mental factors are divided as substance and function: from substance arises function, and function is precisely substance; in discussing the creation of karma now, it is spoken of in terms of function. Therefore the Karma Commentary says: "Speaking of mind does not necessarily mean volition, but speaking of volition must mean mind." This should be carefully examined.