Why preach the gospel to yourself (No. 3)

Here is another reason to preach the gospel to yourself given by Melvin Vincent in his book A Gospel Primer for Christians:

The gospel is so foolish (according to my natural wisdom),so scandalous (according to my conscience), and so incredible (according to my timid heart), that it is a daily battle to believe the full scope of it as I should. There is simply no other way to compete with the forebodings of my conscience, the condemnings of my heart, and the lies of the world and the Devil than to overwhelm such things with daily rehearsings of the gospel.

(Scriptures cited: I Cor. 1:21, 23; I John 3:19; II Cor. 4:4.)