妙法蓮華經玄義 4.80

4.80

二、梵行者，梵者，淨也。無二邊愛見證得，名之為淨。以此淨法，與拔眾生，即是無緣慈、悲、喜、捨也。

Second, as for the pure practice: 'Brahma' means pure. Being free from the realization of love and views belonging to the two extremes is called pure. Using this pure dharma to bestow upon and rescue sentient beings is non-referential benevolence, compassion, sympathetic joy, and equanimity.