大般涅槃經義記 7.140

7.140

上來第一依生空觀對治離過，自下第二依法空觀對治離過。於中有三：一觀五欲無常苦過、二「復次」下觀察五欲能令眾生輪轉之過、三「以是生死行苦」已下念慧捨離。初中，「觀欲無有歡樂」，法說明苦；「不得暫停」，法說無常。「如犬囓」等，喻說明苦；「如水泡」等，喻說無常。「觀欲如是多諸過惡」總以結之。

The above is the first [part], relying on the contemplation of the emptiness of sentient beings as a remedy to abandon faults. From here on is the second [part], relying on the contemplation of the emptiness of dharmas as a remedy to abandon faults. Herein there are three: first, contemplating the faults of impermanence and suffering in the five desires; second, from 'furthermore' below, contemplating the fault that the five desires can cause sentient beings to transmigrate; third, from 'because of this suffering of conditioning in birth and death' below, mindfulness and wisdom abandoning them. In the first, 'contemplating desires as having no joy' explains suffering in terms of the dharma; 'unable to stop for even a moment' explains impermanence in terms of the dharma. 'Like a dog gnawing...' and so forth explains suffering by analogy; 'like water bubbles...' and so forth explains impermanence by analogy. 'Contemplating desires as having many faults and evils like this' concludes it as a whole.