From; Ellen G. White
Desire Of Ages

Every act of Christ’s ministry was far-reaching in its purpose. It comprehended more than appeared in the act itself. So in the case of the leper. While Jesus ministered to all who came unto Him, He yearned to bless those who came not. While He drew the publicans, the heathen, and the Samaritans, He longed to reach the priests and teachers who were shut in by prejudice and tradition. He left untried no means by which they might be reached. In sending the healed leper to the priests, He gave them a testimony calculated to disarm their prejudices. {DA 265.1}

The Pharisees had asserted that Christ’s teaching was opposed to the law which God had given through Moses; but His direction to the cleansed leper to present an offering according to the law disproved this charge. It was sufficient testimony for all who were willing to be convinced. {DA 265.2}