He says that the proper aim of any creature is to self-surrender – to offer back the will which we claim as our own, and this necessity is a daily occurrence which is inherently painful. He says this process is made easier through pain itself because 1) people would not surrender if all was well, so pain is recognizable and unmasked evil; “every man knows something is wrong when he is being hurt.” 2) Pain shatters the illusion that we have enough for ourselves. 3) We know we’re acting for God’s sake if the material action of our choice is painful or at least contrary to our inclinations.