How do we know God's sovereignty in healing is true?

The story of Jesus healing the leper illustrates God's sovereignty in action; the leper declares, 'If thou wilt, thou canst make me clean,' acknowledging Christ's power. Jesus responds with 'I will; be thou clean,' demonstrating that healing and cleansing come from His will alone. This act affirms the biblical tenet that God has authority to bestow mercy upon whom He chooses (Romans 9:15). The instantaneous nature of the leper's cleansing further validates God's sovereign control not only over physical ailments but also over spiritual healing.