Human life is governed by the heart. The physical heart sustains the body by pumping life-giving blood to every organ and cell. The spiritual heart, on the other hand, is God's dwelling place on earth. Our success or failure in life depends not upon material wealth or social status but upon the condition of our spiritual heart. Everyone without exception needs a new heart from God, clean and right before Him, because without a new heart there cannot be a new life. The heart holds the keys of life. Downing's Heart Manual is biblically and scripturally based to help students know their own hearts and enable them to meet the challenges of life from a heart perspective. This 2-year study guide is designed to help students and teachers broaden their knowledge of the heart and of how to love the Lord with all of their heart, which is the first and greatest commandment (Matthew 22:37-38). Knowledge of our heart is very important because out of the heart flow the issues of life (Proverbs 4:23). In Hosea 4:6 God says, "My people are destroyed for lack of knowledge." Spiritual heart knowledge-God's heart as well as our own-is essential for eternal life. This one-of-a-kind heart manual will guide students on an intimate journey into the very heart of God. Dr. Donald R Downing, a heart physician and specialist for God, has been writing and teaching on the heart for over 21 years. The author of over seven books on the heart, he believes that the greatest need of the church today is for leaders who are also spiritual heart specialists and physicians, and who have pure and clean hearts before God.