Mat 12:29 Or else how can one enter into a strong man's house, and plunder his goods, except he first bind the strong man? and then he will plunder his house.

This statement equates a person inflicted with evil spirits with the house of a strong man whose abilities are owned by a demon.

"A strong man" is ischuros, which means "strong," "mighty," and "powerful." It is from ischus, meaning strength. Here is seems as though it is used to refer to demons that control people.

"Plunder" is from diarpazô, which means "to tear into pieces," "to efface," "to spoil," and "to plunder."

"Goods" is skeuos, which means "a vessel," "an implement," "a piece of equipment," "household furnishing," and "an inanimate object."

"Bind" is deô, which means "to bind," "to tie," and "to fetter. "

In the gospels, afflications of all types are attributed to "demons." Certainly this analogy works well for various types of addictions, but the gospels apply it to physical infirmities as well, which is very different than the way we think today, but rather than get all caught up in the "supernatural" aspects of demons, generally Christ's teaching work well in a modern sense if we simply think of all afflictions as burdens, the burdens of being alive. So Christ is saying that a our afflictions must be tied up, that is, chained or disarmed, before we can recover our abilities. The idea is that we can recover at least our sense of power if we recognize a power greater than whatever is afflicting us.