Stephen Um (Ph.D., University of St. Andrews) is the senior minister of Citylife Presbyterian Church in Boston, MA. He serves as a Council member with The Gospel Coalition, a trainer for Redeemer City to City, and an adjunct professor in New Testament at Gordon Conwell Theological Seminary. For the past 28 years, Stephen and his wife, have been involved in several Presbyterian Churches throughout the Northeastern part of the country. He is the author of The Kingdom of God, Why Cities Matter (Crossway, 2013), the commentary on 1 Corinthians from the Preaching the Word series (2015), and Micah for You (Good Book Company, 2018). His sermons and resources are available online at The Center for Gospel Culture.