Preaching the gospel to yourself makes a difference

Here is the testimony of Milton Vincent in the introduction to his book A Gospel Primer for Christians:

Over the course of time, preaching the gospel to myself every day has made more of a difference in my life than any other discipline I have ever practiced. I find myself sinning less, but just as importantly, I find myself recovering my footing more quickly after sinning, due to the immediate comfort found in the gospel. I have also found that when I am absorbed in the gospel, everything else I am supposed to be toward God and others seems to flow out of me more naturally and passionately. Doing right is not always easy, but it is never more easy than when one is breathing deeply the atmosphere of the gospel. I am confident that you will find the same to be true in your life as well.