法華論疏 2.8

2.8

諸佛智慧甚深無量，其智慧門難見難覺難知難解難入。如來所證，一切聲聞、辟支佛等所不能知。

The wisdom of the buddhas is profound and immeasurable; its gate of wisdom is difficult to see, difficult to comprehend, difficult to know, difficult to understand, and difficult to enter. That which the Tathāgata has realized cannot be known by any śrāvakas, pratyekabuddhas, or others.