大乘百法明門論開宗義決 1.131

1.131

諸善法影常現前者。佛地經云。譬如明鏡安在高臺。世間境界若非處在遠闇障者。悉於鏡中而現影像。如是如來大圓鏡智安在法界真如理上。一切眾生不愚不迷不障中者。諸善法影悉於中現。

Regarding 'The reflections of all wholesome dharmas constantly appear': the Buddhabhūmi-sūtra says: 'For example, like a bright mirror placed on a high terrace: if the objects of the world are not located in distant, dark, or obstructed places, they all manifest their reflections in the mirror. Just so, the Tathāgata's ādarśa-jñāna is situated upon the principle of the tathatā of the dharma-dhātu; for all sentient beings who are not in the midst of foolishness, delusion, or obstruction, the reflections of all wholesome dharmas are manifested within it.'