淨名經集解關中疏 1.267

1.267

諸仁者是身無常無強無力無堅。速朽之法不可信也　此下次正說無常苦空無我四觀文也。此初無常觀。夫無常者悟身有為體性滅。此理無常也。阿階道果若四時代謝形變色衰。此是事轉非真悟也。肇曰。身之危脆強力不能保。孰能信其永固者。此無常義也。

"Virtuous sirs, this body is impermanent, without strength, without power, and without firmness; being a phenomenon that quickly decays, it cannot be trusted." Here begins the text that directly explains the four contemplations of impermanence, suffering, emptiness, and non-self. This is the first, the contemplation of impermanence. As for impermanence: one awakens to the fact that the conditioned body has an intrinsically perishable nature—this is the principle of impermanence. How can the fruit of the path be attained if one only views it as the alternation of the four seasons or bodily change and declining vitality? That is merely phenomenal change, not true awakening. Sengzhao states: "The body is frail and fragile; even great strength cannot preserve it. Who could trust that it is perpetually stable? This is the meaning of impermanence."