From New York Times bestselling authors Timothy Keller and Kathy Keller comes a beautifully packaged daily devotional that takes us on a year-long journey to discover the meaning of marriage. Marriage is the deepest human relationship that exists. To know and love our spouse is one of the most rewarding and wonderful things we can experience in life, but it is also one of the most difficult and painful. In this 365-day devotional, Timothy Keller and his wife of forty-three years, Kathy Keller, share powerful instructions on how to have a successful marriage.