妙法蓮華經玄贊 2.17

2.17

六為何等事說彼彼法，入彼彼事不退轉，謂以慈修身。論云「以大慈悲而修身心」，此釋所由。諸菩薩為何等事，外為他說法，內入證諸法？以大慈悲熏修身心，拔苦與樂故，顯行二利但為慈、悲，不由餘事。慈悲各有三，如下當說。

Sixth, 'non-retrogression in expounding various teachings for various purposes and entering into various matters': that is, 'cultivating the body with loving-kindness.' The Treatise states: 'Cultivating body and mind with great loving-kindness and compassion.' This explains the reason. For what purposes do bodhisattvas expound the Dharma externally to others, and internally enter and realize phenomena? It is because through great loving-kindness and compassion they perfume and cultivate body and mind, eradicating suffering and granting joy; this reveals that practicing the two benefits is solely for the sake of loving-kindness and compassion, not due to anything else. Loving-kindness and compassion each have three kinds, as will be explained below.