法華玄義釋籤 12.37

12.37

並是法身益物。然冥益者，不見不聞而覺而知；若非冥非顯，不見不聞不覺不知。

Both are the dharma body benefiting beings. However, in concealed benefit, one does not see and does not hear, yet is aware and knows; if it is neither concealed nor manifest, one does not see, does not hear, is not aware, and does not know.