大乘起信論義記 3.421

3.421

治中六時禮拜等，總明除障方便，如人負債，依附於王，則於債主無如之何；如是行人禮拜諸佛，諸佛所護，能脫諸障。懺悔下，別除四障：一、諸惡業障，懺悔除滅。二、謗正法障，勸請除滅。三、嫉妬他勝障，隨喜對治。四、樂三有障，迴向對治。由此四障能令行人不廢諸行，不趣菩提，故修是四行以對治之。又初一治業障，以止持故；後三長善根，以作持故。

In the remedies, bowing during the six periods, etc., generally clarifies the expedient means for eliminating obstacles. Just as a debtor who depends on a king cannot be touched by the creditor, so too a practitioner who bows to the Buddhas is protected by the Buddhas and can escape all obstacles. From 'repenting' onward, the four obstacles are eliminated separately: first, the obstacle of evil karma is eliminated through repentance; second, the obstacle of slandering the true Dharma is eliminated through supplication; third, the obstacle of envying the excellence of others is remedied through rejoicing; fourth, the obstacle of delighting in the three realms of existence is remedied through pariṇāmanā. Because these four obstacles can cause practitioners not to abandon practices and not to proceed toward bodhi, one cultivates these four practices to remedy them. Moreover, the first remedies karmic obstacles through observance by abstention; the latter three increase wholesome roots through observance by action.