釋禪波羅蜜次第法門 9.78

9.78

行者深觀欲界惡事如是，無有樂處，乃至上二界果報破壞時，憂苦甚於下界，譬如極高處墮落，摧碎爛壞。經言：「三界無安，猶如火宅，眾苦充滿，甚可怖畏。」若常觀是相，則深生厭離，愛覺不生，是名世間不可樂想。

The practitioner deeply contemplates that the evil occurrences of the desire realm are like this, without any place of pleasure; even when the retribution of the upper two realms breaks down, their anxiety and suffering are worse than those of the lower realms, just like falling from an extremely high place, shattered and ruined. The sūtra states: 'There is no peace in the three realms; they are just like a burning house, filled with manifold sufferings, extremely terrifying.' If one constantly contemplates these marks, one will deeply give rise to revulsion and detachment, and thoughts of attachment will not arise. This is called the notion of the impermissibility of delight in the world.