When the person with leprosy went before the priest as required by law, the priest would decide whether or not the person had leprosy, and, if so, the priest would pronounce him unclean. We also recognize that although his illness was a plague, Naaman and all lepers like the one in this portion of the Scripture are loved by the Lord Jesus Christ for His love is impartial. Sin is a type of leprosy, and just as the disease of leprosy brings total illness, total death with no cure, sin does the same thing spiritually for everyone. Friend, with no cure for leprosy, Jesus only could heal the man and make him whole. So it is with the sinner.
Sin is incurable.
There is only One, who can cure it. His name is Jesus. Let us give thanks to God that Jesus Christ can heal the leper, And He can make us whole spiritually. In healing the leper, we have a perfect, true historical experience that gives courage to saint and sinner. If He healed one leper, If He raised one Lazarus, He can forgive my sins and make me whole.