釋禪波羅蜜次第法門 8.9

8.9

答曰：餘禪乃有發通明之義，不如此禪利疾，故名通明。

Answer: Although other dhyānas have the sense of manifesting supernormal knowledges and clarity, they are not as swift and sharp as this dhyāna; hence it is called penetrating clarity.