I remember many years ago hearing a gentleman at a conference speaking on the replacement theory. He was discussing the problems with rock music and when a person attempts to remove it from their life, they often go back to it, because they do not replace it with good Christian music. What he said has stuck with me over the years and I have learned it applies to many things in our lives.
It works even with the food we eat. When we eat a food that is not good for us and we want to remove it from our diet, it should be replaced by another food that is good for us.
It also, definitely works in our spiritual lives. When we have problems with the devil always inserting bad thoughts into our brain, we should kick him out with scripture, hymns, praise songs, and prayer. The devil will eventually back off (fair warning) for a time.
I have been thinking about writing about these things and this morning my devotion was on the same subject. The writer quotes Aristotle "Nature abhors a vacuum." The writers states, and I agree that when something is removed, it is always replaced by something, even if it is just air. Quoting the author "The only permanent solution to the problem of sin in our lives is to replace it with the love of Jesus, which fills the vacuum. The more we are filled with His love, the less room there is for any evil thing."–Julie Ackerman Link, Our Daily Bread, January 21, 2011.
Be filled with all the fullness of God.–Ephesians 3:1
Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good report; if there be any virtue, and if there be any praise, think on these things.–Philippians 4:8