首楞嚴義疏注經 1.641

1.641

此舉新晴，太陽高照，光入牖隙，現空中塵，搖動不息。此喻俱生煩惱微細難見，自非觀智照現終不覺知，與身俱生、與心同事，故此煩惱體全是生滅虛妄不息。主人及空，俱喻真性不動之義。始佛問悟客塵，此欲陳如明其行相，意引阿難聞而開解，了真見常寂，身境動搖。陳如剖析，甚合佛心，故此印可言如是也。

This cites skies freshly clearing, with the sun shining high and its light entering through a window chink, revealing the dust in the air, drifting without cease. This analogizes innate afflictions as subtle and hard to see; without the illumination of contemplative wisdom, one remains completely unaware of them. Arising together with the body and acting together with the mind, the substance of these afflictions is entirely arising and ceasing, false and unceasing. Both the host and space analogize the true nature's quality of being unmoving. At first the Buddha asked about awakening to the guest-dust, wishing Kauṇḍinya to clarify their characteristics, intending to guide Ānanda to hear and awaken to understanding, comprehending that true seeing is constantly still, while the body and objects fluctuate. Kauṇḍinya's analysis was thoroughly in accord with the Buddha's intention, hence [the Buddha] confirmed it, saying 'So it is.'