摩訶止觀 8.137

8.137

安忍者：但勤正助，莫為內外障緣阻礙休息。答正助稽留，疾成道廢。能安心在疾，不動不退，所作辦也。

Patient endurance: One must only be diligent in the correct and auxiliary, and not allow internal or external obstructing conditions to hinder or halt [the practice]. If one responds to delays in the correct and auxiliary, the illness will take hold and the path will be abandoned. If one can calm the mind in the face of illness, neither wavering nor retreating, what is to be done will be accomplished.