大方廣圓覺修多羅了義經略疏 2.421

2.421

由前念澄覺識，慧性開明。因靜生慧，故云靜慧。比隱今顯，故云發生。

Because of the previous clarification of thoughts and perception of consciousness, the nature of wisdom becomes bright and open. Because wisdom arises due to stillness, it is called 'still wisdom.' What was previously hidden is now revealed, so it is said to 'arise.'