法華玄論 10.112

10.112

十八者觀音即是四等，謂慈心欲與樂、悲心欲拔苦、喜心慶脫苦得樂、捨心修於平等。普門即是四攝攝取眾生，應以布施攝者即以布施攝之，餘亦如是也。

Eighteenth: Guanyin is the four immeasurables: the mind of loving-kindness desires to give happiness; the mind of compassion desires to uproot suffering; the mind of joy rejoices in deliverance from suffering and attainment of happiness; the mind of equanimity cultivates impartiality. "Universal Gate" is the four means of embracing, gathering in sentient beings: those who should be gathered in through generosity are gathered in through generosity, and the rest are likewise.