Now as to the second part, it is no less difficult to convince men of its truth—that whatever they touch is contaminated, when they are themselves unclean; and yet this is what God had plainly made known to the Jews: and the priests hesitated not nor doubted, but immediately returned an answer, as though the matter was well known—that an unclean man contaminates whatever thing he touches. But when we come to apply the subject, men then reject what they had been clearly taught; nay, what they are forced to confess, until they see the matter brought home to them, and then they begin to accuse God of too much rigour: “Why is this, that whatever we touch is polluted, though we might leave some defilement? Are not our works still deserving of some praise, as they are good works?” And hence also is the common saying, That works, which are in their kind good, are always in a measure meritorious, and though they are without faith, they yet avail to merit the gift of faith, inasmuch as they are in themselves praiseworthy, as chastity, liberality, sobriety, temperance, beneficence, and all alms giving. But God declares that these virtues are polluted, though men may admire them, and that they are only abominable filth, except the heart be really cleansed and purified. Why so? because nothing can flow from an impure and polluted fountain but what is impure and polluted.