IV. Here is an affectionate expostulation with them, in the close, upon the whole matter. Though it was adjudged next to impossible for them to be brought to do good (v. 23), yet while there is life there is hope, and therefore still he reasons with them to bring them to repentance, v. 27. 1. He reasons with them concerning the thing itself: Wilt thou not be made clean? Note, It is the great concern of those who are polluted by sin to be made clean by repentance, and faith, and a universal reformation. The reason why sinners are not made clean is because they will not be made clean; and herein they act most unreasonably: "Wilt thou not be made clean? Surely thou will at length be persuaded to wash thee, and make thee clean, and so be wise for thyself." 2. Concerning the time of it: When shall it once be? Note, It is an instance of the wonderful grace of God that he desires the repentance and conversion of sinners, and thinks the time long till they are brought to relent; but it is an instance of the wonderful folly of sinners that they put that off from time to time which is of such absolute necessity that, if it be not done some time, they are certainly undone for ever. They do not say that they will never be cleansed, but not yet; they will defer it to a more convenient season, but cannot tell us when it shall once be.