“The Bible will keep you from sin, or sin will keep you from the Bible.”
~Dwight L. Moody
This is why it is so important to stay in the Word of God. The Word is what continues to feed you Light! Light and darkness quarrel. Jesus is the Light and Satan is the most notorious character of darkness.
Just point out to a Christian brother or sister that what they are doing isn’t healthy for them spiritually. You will have a very defensive upset individual. Why? Because that part of the spirit which isn’t in the Light isn’t going to go down without a fight.
We need to be in the Word, because the Word is the flashlight which illuminates the dark places we put ourselves. You start reading the Word and that light starts shining on things which you didn’t even realize were there. Wisdom comes from hearing the Word of God. Fill your day with it.