Luke 8:29

‘For he was commanding the unclean spirit to come out from the man. For oftentimes it had seized him, and he was kept under guard, and bound with chains and fetters, and breaking the bands asunder, he was driven of the demon into the deserts.'

The reason for his cry was because Jesus was persistently calling on the unclean spirit to come out of the man. We are now told a little more of what the unclean spirit had done to the man. It had regularly seized him and made him violent, so that when caught he was bound and fettered and kept under guard. But through its supernatural strength he was able to break the fetters, at which the demon drove him into the wilderness so that they would be away from men. They did not like being restrained. They wanted wild freedom.

‘The unclean spirit.' Note the equation of ‘demons' (a Greek term) with ‘unclean spirits'. They are ‘unclean' in contrast with the ‘cleanness' or purity of God. An ‘unclean spirit' is a spirit which hates God and all things to do with God, and shrinks from His presence. Its very behaviour is unclean. And it further rendered this man ‘unclean' in Jewish eyes by his dwelling among the tombs. The man is specifically identified as demon possessed. It is probable that he was a Gentile (Consider his close proximity to pig farms, abhorrent to orthodox Jews).