There being then a twofold species of vice—that characterized by craft and stealth, and that which leads and drives with violence—the divine Word cries, calling all together; knowing perfectly well those that will not obey; notwithstanding then since to obey or not is in our own power, provided we have not the excuse of ignorance to adduce. He makes a just call, and demands of each according to his strength. For some are able as well as willing, having reached this point through practice and being purified; while others, if they are not yet able, already have the will. Now to will is the act of the soul, but to do is not without the body. Nor are actions estimated by their issue alone; but they are judged also according to the element of free choice in each,—if he chose easily, if he repented of his sins, if he reflected on his failures and repented (μετέγνω), which is (μετὰ ταῦτα ἔγνω) “afterwards knew.” For repentance is a tardy knowledge, and primitive innocence is knowledge. Repentance, then, is an effect of faith. For unless a man believe that to which he was addicted to be sin, he will not abandon it; and if he do not believe punishment to be impending over the transgressor, and salvation to be the portion of him who lives according to the commandments, he will not reform.