The Strong Man
Deliverance requires a stronger conqueror.
Jesus uses a short image of binding the strong man to explain spiritual conflict and the reality of his authority.
Scripture
29 Or else how can one enter into a strong man's house, and spoil his goods, except he first bind the strong man? and then he will spoil his house.
27 No man can enter into a strong man's house, and spoil his goods, except he will first bind the strong man; and then he will spoil his house.
21 When a strong man armed keepeth his palace, his goods are in peace:
22 But when a stronger than he shall come upon him, and overcome him, he taketh from him all his armour wherein he trusted, and divideth his spoils.