Nothing in the Bible has been or will be disproved. Critics have been silenced through the ages because the Bible has been proved to be right in all that it states, incredible! Why? because it is written through inspiration and revelation from God.
How safe can it get! Glory to God!
2Ti 3:16 All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:
2Ti 3:17 That the man of God may be perfect, throughly furnished unto all good works.
There is so much said about casting out of demons on this site and there is something very important that our Lord warns us about.
That is that an unbeliever needs to be converted after deliverance or else he will be worse off than before.
He needs to give his life to Christ – this is to say that void, through his deliverance, needs be filled with God, our Saviour and His Holy Spirit.
Luk 11:24 When the unclean spirit is gone out of a man, he walketh through dry places, seeking rest; and finding none, he saith, I will return unto my house whence I came out.
Luk 11:25 And when he cometh, he findeth it swept and garnished.
Luk 11:26 Then goeth he, and taketh to him 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.
2Pe 2:20 For if after they have escaped the pollutions of the world through the knowledge of the Lord and Saviour Jesus Christ, they are again entangled therein, and overcome, the latter end is worse with them than the beginning.
It is possible for a demon to return:
Mar 9:25 When Jesus saw that the people came running together, he rebuked the foul spirit, saying unto him, Thou dumb and deaf spirit, I charge thee, come out of him, and enter no more into him.
I remember many years ago the Evangelist Reinhard Bonke had a simple sermon which went like this:
This couple, who wanted to live good lives gave Jesus a key to live in one room in their apartment.
But each day Satan would knock on the door. They never knew it was him until they partially opened the door and then seeing Satan, struggled and fought to keep him out and to get the door closed.
In fact each day left them more exhausted than before, and they didn’t know for how much longer they could resist him, when Jesus, standing behind them said; ‘Give me all the keys to your apartment and I will take care of you’, with much relief they did this.
The next day there was once again a knock on the door, this time Jesus threw the door wide open, and Satan seeing Jesus, was heard to remark; ‘Sorry wrong apartment’ and stepping back moved away.
This is much the same as what is said in the above verses.
Jesus loves you!