大方廣佛華嚴經隨疏演義鈔 20.61

20.61

疏「見性得樂，性即是門」者，若約解，苦無苦苦，為見性之門。今約見性成佛，故性為聖樂之門。

Regarding the commentary's statement, "Seeing the nature, one attains joy; nature is precisely the gate": if speaking in terms of understanding, suffering having no suffering of suffering is the gate to seeing the nature. Now, speaking in terms of seeing the nature to become a Buddha, nature is therefore the gate to noble joy.