Before he was king, David was a shepherd. As he spent his days and nights looking after sheep in the desert, he learned some of life's most important lessons. This great future leader learned that he was, before anything else, a sheep in God's pasture, under the shepherd's care. Years later, after many victories and many defeats, he put these life lessons into words. Psalm 23 is David's manifesto. His creed. His statement of faith and purpose. It's a summary of life's most important lessons.