14:57 To teach - To direct the priest when to pronounce a person or house clean or unclean. So it was not left to the priests power or will, but they were tied to plain rules, such as the people might discern no less than the priest.
14:54-57 When that God who is rich in mercy, for his great love wherewith he loved us, even when we were dead in sins, hath quickened us by his grace, Eph 2:4,5, we shall manifest the change by repenting, and forsaking former sins. Let us follow after holiness, and let us compassionate other poor lepers, and desire, seek, and pray for their cleansing.