維摩經略疏垂裕記 2.20

2.20

三、「問法」下，難佛自解說者，即經云「大慈悲為室，柔和忍辱為衣，諸法空為座」也。「師心」者，前心不善、後心隨之名師心。前心不善、後心改之名心師。前心為後心所訓也，故《涅槃》云「願為心師，不願師心。」今以妄作解釋是不善心而不知改名師心也。

Third, from "Question: As for the Dharma..." downward, raising a challenge to the Buddha's own explanations: that is where the sūtra says, "Great compassion is the room, gentleness and forbearance are the robe, and the emptiness of all dharmas is the seat." As for "making the mind one's master," when a prior mind is unwholesome and a subsequent mind follows it, this is called making the mind one's master. When a prior mind is unwholesome and a subsequent mind corrects it, this is called being a master to the mind. The prior mind is instructed by the subsequent mind; hence the *Nirvāṇa [Sūtra]* says: "One should vow to be a master to the mind, not to make the mind one's master." Here, using arbitrary fabrications to explain is an unwholesome mind, and failing to correct it is called making the mind one's master.