妙法蓮華經玄義 3.167

3.167

However, the ten precepts for protecting others emerge from the five branches of one's own practice: from the two branches of the fundamental and the adjuncts emerge the prohibitive precepts, pure precepts, and good precepts. Why? The procedures of the disciplinary categories are the prohibitive precepts. If the prohibitive precepts generate non-informative form (avijñapti-rūpa), they are then called pure, and purity is good through cessation; and speaking of good precepts, this is good through active practice.