菩薩戒義疏 2.52

2.52

第三十四、暫念小乘戒，乖本所習故制。七眾同犯。大小不共，以習各異。欲背大向小，心計未成，犯前第八背大向小戒；計成失戒，在第十重戒中說。此戒所制不欲背大，正言小乘易行，且欲斷結然後化生。序事有兩：一、應，應念大乘。略舉三事：一、護大乘戒。凡舉兩譬：一、金剛，取堅義。「浮囊」，如《大經》，「草繫」出《因緣經》。二、生大乘信。三、發大乘心。「若起」下，二、不應，不應一念起自度之想。「外道」者，指二乘為外道。若權入此道為化，非所制也。

Thirty-fourth: the precept against temporarily dwelling on the Hīnayāna, instituted because it runs contrary to what was originally practiced. All seven assemblies equally commit an offense. Mahāyāna and Hīnayāna do not share it, because their practices are distinct. If one wishes to turn away from the Great and head toward the Small, but the mental scheme is not yet finalized, one commits the previous eighth precept against turning away from the Great and heading toward the Small; once the scheme is finalized, one loses the precepts, as explained under the tenth major precept. What is prohibited by this precept is not the desire to turn away from the Great, but merely saying that the Hīnayāna is easy to practice and wishing temporarily to sever fetters and transform beings afterward. The narrative of events has two parts: First, what should be done: one should be mindful of the Mahāyāna. It briefly cites three matters: first, protecting the Mahāyāna precepts. In all, two similes are given: first, the vajra, taking the sense of firmness. The "floating bladder" is as in the Mahāparinirvāṇa-sūtra; the "bound by grass" comes from the Nidāna-sūtra. Second, generating faith in the Mahāyāna. Third, giving rise to the Mahāyāna mind. From "If one gives rise to..." onward is the second, what should not be done: one should not give rise to thoughts of self-deliverance even for a single moment. "Non-Buddhists" points to the two vehicles as non-Buddhists. If one provisionally enters this path to transform beings, it is not what is prohibited.