首楞嚴義疏注經 5.401

5.401

正觀察也。既世界、身心皆由風動，風自何生而動諸物？物不動時去至何所？風既無從，物成妄動，故見十方一切眾生狂自鼓鬧，同一虛妄，本無所因。

This is direct observation. Since the world, body, and mind are all moved by wind, from where does wind arise to move the various things? When things do not move, where does it go? Since the wind has nowhere from which it comes, things form delusive movement; therefore one sees all sentient beings of the ten directions madly drumming and bustling of themselves, sharing the same single falsity, originally without any cause.