菩薩戒本疏 2.117

2.117

此下五戒明攝善行，初遮念餘乘道，次遮不起大願，次遮不發堅誓，次遮不修離著，次遮不遜長幼。初不念餘乘者，恐虧大行故制。道俗同學。大小不共，以所習各異故。文中列事有三：一、護誦戒法。「護持禁戒」者，謂若性若遮皆悉護持。「日夜六時讀誦是戒」者，若文若義誦持不忘。「猶如金剛」者，持心堅固因緣不殂故。「帶持浮囊欲度大海」者，愛惜守護不欲漏故，事出《涅槃經》。「如草繫比丘」者，謹慎敬持不敢犯故，事出《因緣經》。二、生大乘信。「自知我是未成佛」者，雖有佛性因未修故。「諸佛是已成佛」者，已修妙因剋勝果故。三、「發菩提心，念念不去心」者，期心大果，餘念不間。「若起一念」下，就後顯犯。

The five precepts from here down clarify practices of gathering goodness: first, preventing thoughts of the path of other vehicles; next, preventing the failure to give rise to great vows; next, preventing the failure to make firm vows of commitment; next, preventing the failure to cultivate detachment; and next, preventing the failure to yield to seniors and juniors. First, regarding not harboring thoughts of other vehicles, it was instituted for fear of diminishing great practice. Monastics and laity train together. It is not shared between the Greater and Lesser [Vehicles], because that which they practice differs. In the text, three matters are listed: First, guarding and reciting the precept teachings. 'Guard and maintain the restrictive precepts' means guarding and maintaining both the natural precepts and the instituted prohibitions. 'During the six periods of the day and night, recite these precepts' means reciting and upholding both text and meaning without forgetting. 'As if they were adamantine' means because the upholding mind is steadfast and conditions cannot destroy it. 'Carrying a floating life-preserver wishing to cross a great ocean' means cherishing and guarding them, not wishing there to be any leak; this matter comes from the Nirvāṇa-sūtra. 'As if you were the monk bound by grass' means conscientiously and respectfully upholding them without daring to violate them; this matter comes from the Avadāna-sūtra. Second, generating faith in the Mahāyāna. 'Knowing of yourself: I am a Buddha yet to be accomplished' means that although one possesses the Buddha-nature, the cause has not yet been cultivated. 'All Buddhas are Buddhas already accomplished' means that they have already cultivated the wondrous cause and attained the supreme fruit. Third, 'generate the bodhicitta, not departing from it in thought after thought' means directing the mind toward the great fruit, without interruption by other thoughts. From 'if one gives rise to a single thought' downward, it indicates the offense with respect to the latter.