首楞嚴義疏注經 3.71

3.71

人喻真性，本自覺故。勞倦則眠喻無明迷真，性不了故。睡熟喻動念現境，謂睡故成夢，夢具心境。心喻業轉，境喻現相。寤喻事識，事識取所現境，分別染淨，不了自心所現，見從外來，如憶夢中之事不得明了，故云覽塵斯憶。失憶，為忘也。

The person symbolizes the true nature, because it is fundamentally aware of itself. Sleeping when fatigued symbolizes ignorance deluding the real, because its nature does not comprehend. Sleeping deeply symbolizes moving thought manifesting objects; that is to say, because of sleep, dreams are formed, and dreams possess both mind and object. Mind symbolizes the karmic transformation, and object symbolizes the manifested mark. Waking symbolizes the phenomenal consciousness; the phenomenal consciousness grasps the manifested objects, discriminating between defiled and pure, failing to understand that they are manifested by one's own mind, and viewing them as coming from outside, just as in recollecting matters within a dream without being able to be clear; therefore it says 'upon inspecting dusts he remembers; losing recollection becomes forgetting.'