大乘入道次第開決 1.119

1.119

以自相續身等為境者。自相續者即謂自體。若言自身則不通心等。故以相續言顯總包也。言身等者。謂即等取受心法也。觀自身境以修不淨對治之觀。觀自受境以修非樂對治之行。餘二准知。

Regarding "taking the body and so forth of one's own continuum as the cognitive object": "one's own continuum" refers to one's own substance. If one only said "one's own body," it would not extend to the mind and so on; therefore, using the word "continuum" shows its overall inclusion. "The body and so forth" means it includes feeling, mind, and dharmas. One observes the object of one's own body to cultivate the antidotal contemplation of impurity. One observes the object of one's own feelings to cultivate the antidotal practice of non-pleasure. The remaining two should be understood accordingly.