Book excerpt: From New York Times bestselling authors Timothy Keller and Kathy Keller comes a gorgeously packaged daily devotional that takes us on year-long journey into discovering the meaning of marriage Marriage is the most profound human relationship there is. Coming to know and love your spouse is one of the most rewarding and wondrous 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. The Kellers draw from and expand upon lessons they first introduced in their book The Meaning of Marriage, offering stories, daily scriptures, and prayer prompts that will inspire anyone who wants to know God and love more deeply in this life.