大方廣圓覺修多羅了義經略疏 1.810

1.810

初四念者，一觀身五種不淨，謂種子、住處、自相、自性、究竟；二觀三受皆苦，謂苦、樂、捨；三觀心念念無常；四觀諸法無我。此對治凡夫四倒也。又觀身畢竟空；觀受內外空；觀心無所有；觀法但有名。此對治二乘四倒也。

First, the four [applications of] mindfulness: First, contemplating the body as fivefold impurity—namely seed, dwelling place, self-characteristic, self-nature, and ultimate culmination; second, contemplating the three feelings as entirely suffering—namely suffering, pleasure, and neither-suffering-nor-pleasure; third, contemplating the mind as impermanent from thought-moment to thought-moment; fourth, contemplating all phenomena as devoid of self. These counteract the four inversions of ordinary persons. Furthermore, contemplating the body as ultimately empty; contemplating feeling as empty internally and externally; contemplating the mind as having nothing existent; contemplating dharmas as mere designations. These counteract the four inversions of the two vehicles.