妙法蓮華經玄義 6.172

6.172

若三藏法門，觀真為實、觀假為權，以此二智滿，即名為佛。佛即導師，慈悲六道即是女，令他善順真諦名為男。得此法時喜，名此為妻。此心中修諸波羅蜜道品等，即是善知識也。

If it is the Dharma-gates of the Tripiṭaka teaching, contemplating the real is the real, and contemplating the provisional is the expedient; when these two wisdoms are fulfilled, one is called a Buddha. The Buddha is the guide; loving-kindness and compassion toward the six destinies are the daughter; causing others to follow the truth of reality in goodness is called the son. The joy upon attaining this Dharma is called the wife. Within this mind, practicing the perfections, the factors of the Path, and so forth are the good friends.