梵網經菩薩戒本疏 6.94

6.94

First, the intention of the formulation: the great bodhicitta is the root of all practices and the cause of attaining Buddhahood; if one forgets this mind, one conceals its myriad virtues, thereby destroying the three clusters of precepts and losing the five ranks—how could one then be a bodhisattva? Therefore, it had to be formulated.