Mat 12:43 When the unclean spirit is gone out of a man, he walketh through dry places, seeking rest, and findeth none.
This verse seems to stand alone in it's content. Yet, it is a warning to those who have had devils cast out, perhaps referring to the son's of the Jews, who had no belief in Jesus, yet were casting out devil's. This could be dangerous to the one that has been freed of bad spirits. We will see why.
Mat 12:44 Then he saith, I will return into my house from whence I came out; and when he is come, he findeth it empty, swept, and garnished.
The house, the person in which he dwelled, seemed empty. This is the problem. It is good to cast out demons, but NOT if there is no Jesus to fill the person's heart. The presence of Jesus and the Holy Spirit in a person prevents the reentry of bad spirits. They may trouble you from the outside, but the Holy Ghost inside keeps them out. How so?
1 John 4:4 Ye are of God, little children, and have overcome them: because greater is he that is in you, than he that is in the world.
The devil only has access to areas of our house that have sin. That is why we personally must keep our house clean. A one time casting out is not enough. We must keep our house clean and full of light, because the devil dwells in darkness.
Eph 5:8 For ye were sometimes darkness, but now are ye light in the Lord: walk as children of light:
Eph 5:11 And have no fellowship with the unfruitful works of darkness, but rather reprove them.
Eph 5:12 For it is a shame even to speak of those things which are done of them in secret.
Eph 5:13 But all things that are reproved are made manifest by the light: for whatsoever doth make manifest is light.
Mat 12:45 Then goeth he, and taketh with himself seven other spirits more wicked than himself, and they enter in and dwell there: and the last state of that man is worse than the first. Even so shall it be also unto this wicked generation.
The unbelieving generation, though they heard the message of John the Baptist and Jesus, to repent and turn from sins, did not receive a complete cleansing and forgiveness of sins through belief in Jesus and the infilling of the Holy Spirit. They would remain a wicked people. So it is with any nation at any time, that turns from the living God. One by one we come to Jesus. His light within our house keeps away the darkness. We are each given the responsibility to keep our house clean.
Rom 13:12 The night is far spent, the day is at hand: let us therefore cast off the works of darkness, and let us put on the armour of light.
Rom 13:13 Let us walk honestly, as in the day; not in rioting and drunkenness, not in chambering and wantonness, not in strife and envying.
Rom 13:14 But put ye on the Lord Jesus Christ, and make not provision for the flesh, to fulfil the lusts thereof.
Search your heart and remove areas of sin so that a devil may not have a hiding place in your home.