金光明經文句記 3.37

3.37

初、捨別從通。身受心法但是五陰，故知四念本在苦諦。然念處觀修通四教，今唯約圓，謂觀身淨、不淨、非淨非不淨，乃至觀法我、無我、非我非無我，皆成三諦。

First, discarding the specific to follow the general. Body, feelings, mind, and dharmas are merely the five skandhas; therefore, we know that the four stations of mindfulness are originally in the truth of suffering. However, the cultivation of the contemplation of the stations of mindfulness runs through the four teachings; here it is solely in terms of the perfect [teaching], namely, contemplating the body as pure, impure, and neither pure nor impure, up to contemplating dharmas as self, non-self, and neither self nor non-self, all of which constitute the three truths.