How do we know Jesus has authority over sickness?

Jesus' authority over sickness is clearly illustrated in Luke 7 through the centurion’s request for healing for his servant. The centurion recognized that he was under authority and understood that Jesus, too, had ultimate authority. When he said, 'Just say the word, and my servant will be healed,' he displayed profound faith in Jesus' power. This interaction emphasizes that Christ needs only to speak a word for healing to occur, affirming His sovereignty over creation. The healing of the servant is not merely a physical restoration; it signifies the restoration of life and relationship with God, as Christ intercedes for His people.