With his book, the author seeks to show the great importance of spiritual discipline in the life of a Christian. In revealing the essence of spiritual discipline, from the outset Dr. Whitney makes clear her goal, piety. He very successfully motivates the reader to submit himself to certain frames, from which a person seeks to get rid of naturally. All Christians are well acquainted with the struggle of the new and old man, described by the apostle Paul in the seventh chapter of the Epistle to the Romans. How often believers raise perplexed eyes to heaven in search of an answer to the question - how to overcome sin! The answer is in this book!