“The objections which were made against Christ and his disciples gave occasion to some of the most profitable of his discourses; thus are the interests of truth often served, even by the opposition it meets with from gainsayers, and thus the wisdom of Christ brings good out of evil. This is the third instance of it in this chapter; his discourse of his power to forgive sin, and his readiness to receive sinners, was occasioned by the cavils of the scribes and Pharisees; so here, from a reflection upon the conduct of his family, arose a discourse concerning his tenderness for it.”
Matthew Henry