In his book, Addictions: A Banquet in the Grave, Ed Welch reminds us that addiction is a universal human experience, not limited to chemicals. Therefore, every Christian is susceptible to an addiction of one kind or another. Every addiction is built upon the foundation of internalized, unconfessed sin.
Sin by its very nature is more often quiet and secretive than loud and public. For every overt episode of rage, there are dozens of jealousies, manipulations, white lies, and malicious thoughts, one of which immediately register on the conscience. And, according to Scripture, the greatest sin of all is even more covert: I do not love the Lord my God with my whole mind and heart. If our failure to consistently worship the true God is the key feature of sin, we are sinners all (Ed Welch, Addictions, 21).
As Christians, we are too often willing to harbor covert sin. Before we know it, we are under its dominion. A sensitivity to covert sin is one spiritual discipline to protect us against overt life-dominating sin.
But put on the Lord Jesus Christ, and make no provision for the flesh, to gratify its desires (Romans 13:14)