金光明最勝王經疏 2.443

2.443

The commentary says: This is the explanation. The conceptualized is without characteristics and cannot be spoken of as severed; it merely says 'unable to understand.' Defiled dependent [nature] exists; it is said to be 'unable to eliminate', like calling it impure. What is able to purify is wisdom; what is purified is tathatā. The meaning of the sūtra is that the essence of tathatā is neither defiled nor pure; presently one has not yet been able to understand the conceptualized, eliminate the defiled dependent, and purify the perfected.