妙法蓮華經玄義 2.122

2.122

四、觀心者，觀一念無明即是明。《大經》云：「無明明者，即畢竟空。」空慧照無明，無明即淨。譬如有人，覺知有賊，賊無能為。既不為無明所染，即是煩惱道淨。煩惱淨故則無業，無業故無縛，無縛故是自在我。我既自在，不為業縛，誰受是名色、觸、受？無受則無苦。既無苦陰，誰復遷滅？即是常德。一念之心既具十二因緣，觀此因緣，恒作常、樂、我、淨之觀。其心念念住祕密藏中恒作此觀，名託聖胎。觀行純熟，胎分成就。若破無明，名出聖胎（云云）。

Fourth, contemplation of mind: one contemplates a single thought of ignorance as being itself illumination. The Great Sūtra states: "That which is without both ignorance and illumination is ultimate emptiness." Wisdom of emptiness illuminates ignorance, and ignorance is immediately pure. For example, if a person detects that there is a thief, the thief can do nothing. Since one is not defiled by ignorance, the path of afflictions is pure. Because afflictions are pure, there is no karma; because there is no karma, there is no bondage; because there is no bondage, there is the sovereign self. Since the self is sovereign and not bound by karma, who receives this name-and-form, contact, and sensation? Without sensation, there is no suffering. Since there are no suffering aggregates, who undergoes alteration and extinction? This is the virtue of permanence. Since a single thought of mind is endowed with the twelve links of conditioned arising, one constantly contemplates these conditions with the contemplation of permanence, bliss, self, and purity. When thought after thought resides within the secret store, constantly practicing this contemplation, it is called being entrusted to the sacred womb. When the practice of contemplation matures, the stage of the womb is completed. When one breaks through ignorance, it is called emerging from the sacred womb (and so forth).