成唯識論述記 9.57

9.57

述曰：若無漏心，必二空觀隨一現起；若有漏心，必有法執，即加行智既有法執，如何能導空智現前？非由於水，引火生故；非闇為先，導明生故。

The Commentary states: If it is an undefiled mind, it must be the manifestation of one of the two contemplations of emptiness; if a defiled mind necessarily has dharmagrāha, then since preparatory wisdom has dharmagrāha, how could it guide the wisdom of emptiness to manifest? For fire is not caused to arise from water, nor does darkness coming first guide light to arise.