梵網經菩薩戒本疏 6.126

6.126

六、輕重者，難處有深淺，廢行有多少，譏過有厚薄，致有輕重，並準思可知。

Sixth, regarding severity: dangerous places have depths and shallows, the abandonment of practice may be more or less, and the censure of faults may be heavy or slight, leading to degrees of severity, which may be understood by considering them analogously.