妙法蓮華經文句 1.47

1.47

觀心釋者，觀因緣所生法，即空、即假、即中，即空者我無我也，即假者分別我也，即中者真妙我也（云云）。

Explaining in terms of contemplation of mind: contemplating that dharmas arisen through causes and conditions are identical to emptiness, identical to conventional designation, and identical to the middle—identical to emptiness is the "I" that is non-self; identical to conventional designation is the conventionally discriminated "I"; identical to the middle is the true, wonderful "I" (and so on).