When a man with leprosy seeks Jesus to heal him, Jesus does so. And then Jesus tells him to go see the priest and make an offering. Why is that? Because the priest can decree the man ceremonially clean, which will allow him to be a full member of his community again. Jesus wants more for the man than just to make him well, he wants him to be connected. This is no different than the foundation of the church: just as Jesus makes us new again, he makes us new for a purpose, not to live as lone rangers.