How does Jesus' interaction with demons demonstrate His authority?

In the narrative of Mark 5, Jesus' interaction with the possessed man clearly exhibits His authority over demons. By commanding the unclean spirits to identify themselves and to leave the man, Jesus demonstrates that He is not merely a healer but the Sovereign Lord with dominion over all creation, including the spiritual realm. This authority is pivotal in Reformed theology, as it affirms the sovereignty of Christ as the one who conquers sin and evil decisively. His power is not accidental but inherent to His nature as the God-man, providing comforting assurance to believers of His capabilities to intervene in their lives.