“Great Is Thy Faithfulness” is a Christian hymn that originated in the United States. The lyrics were written by Thomas O. Chisholm, a Methodist minister from Kentucky. He wrote the poem in 1923 about God’s faithfulness over his lifetime. The music was composed by William M. Runyan, a friend of Chisholm, specifically for the poem. The hymn was later popularized by the Moody Bible Institute and Billy Graham’s crusades.