American hymn composer and Christian ministerWilliam Marion Runyan was an influential hymn composer best known for setting the poem 'Great Is Thy Faithfulness' to music in 1923. Born in New York, he served as a pastor in Kansas for two decades before becoming a music editor at Moody Bible Institute and Hope Publishing Company. Though he composed over 70 hymns, 'Great Is Thy Faithfulness' remains his enduring legacy, becoming one of Christianity's most beloved hymns after being popularized by ...