Luke 11: 24 “When an impure spirit comes out of a person, it goes through arid places seeking rest and does not find it. Then it says, ‘I will return to the house I left.’ 25 When it arrives, it finds the house swept clean and put in order. 26 Then it goes and takes seven other spirits more wicked than itself, and they go in and live there. And the final condition of that person is worse than the first.”
I always find this verse to be very realistic and a bit “chilling.” We may change our lives and remove habits and sin and maybe even some people who influence us badly. But these verses tell me that even when they are removed unless we replace them with the Spirit of God and stay in His word we will return to our former way of life … and it may be even worse.