Here is a testimony from a fellow who preaches the gospel to himself every day.
This is from a little book written by a fellow I went to school with. His name is Milton Vincent and the book is called A Gospel Primer.
“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.”