The Bible commands believers to "love the Lord with all your heart." But with sinful and fickle hearts, how can they possibly obey that command? The heart, a term used all over the Bible, is a complex reality that captures the totality of a person's inner nature. This book explores the three capacities of the heart (knowing, loving, and choosing), explaining how each is redeemed through the threefold office of Christ (prophet, priest, and king). As readers comprehend the heart as the source of all their thoughts, fears, words, and actions, they will discover principles and practices for orienting their hearts to truly love and obey God with all that they are.