What does it mean to "keep thy heart with all diligence?" In this pastoral work on Proverbs 4:23, Puritan Richard Alleine teaches us that sanctification begins with the inner man. He details the importance of the heart, how to order it rightly, and how a Christian can protect it from the world, the flesh, and the devil. Read this book to grow in godly character and embrace all the blessings of receiving a new heart.