Darrell Bock

DARRELL BOCK (BA, University of Texas; ThM, Dallas Theological Seminary; PhD, University of Aberdeen) has earned recognition as a Humboldt Scholar (Tubingen University in Germany), and is the author of more than forty books, including well-regarded commentaries on Luke and Acts and studies of the historical Jesus. He was president of the Evangelical Theological Society (ETS) for 2000-2001, is a consulting editor for Christianity Today, and serves on the boards of Wheaton College and Chosen People Ministries. His articles appear in leading publications, and he is often an expert for the media on New Testament issues. Dr. Bock has been a New York Times best-selling author in nonfiction and is elder emeritus at Trinity Fellowship Church in Dallas. When traveling overseas, he will tune into the current game involving his favorite teams from Houston, even in the wee hours of the morning. Married for over forty years to Sally, he is a proud father of two daughters and a son, and is also a grandfather.

Brian Sanders

BRIAN SANDERS is the founder of the Underground Network, an international coalition of churches united by the prophetic call to love the poor, reach the lost, and seek biblical justice. The Underground is a new form of church designed and empowered for mission. A serial entrepreneur, Brian has helped to start hundreds of missional enterprises, including churches, non-profits, and businesses all over the world. He holds a degree in communication from the University of Florida, a Masters Degree in Religious Studies from the University of South Florida, and a Masters Degree in Applied Theology from Spurgeon's College. Brian has lived in intentional community in the inner city for more than twenty years, embodying the ideas that drive him. He lives in Tampa, Florida with his wife Monica and their six children.

Harry Schaumburg

HARRY W. SCHAUMBURG, MA, MS, DMin, LMFT, speaker, author and counselor, is the founder and Executive Director of Stone Gate Resources, Inc., a ministry that has addressed the problems of sexual sin within the church for more than eighteen years. Offering real change, his pioneering Brief Intensive CounselingSM program has drawn over two thousand five hundred laity and clergy from the U.S. and eighteen foreign countries. For nearly thirty years, Dr. Schaumburg has been involved in pointing people away from sexual sin to restored intimacy with God and others. He is the author of False Intimacy: Understanding the Struggle of Sexual Addiction, the first book on the subject from a biblical perspective, and Sexual Redemption. Married forty years to his wife Rosemary, they have two adult sons.

Jeff Simmons

JEFF SIMMONS is the founding and senior pastor of Rolling Hills Community Church, which he and his wife, Lisa, planted twenty years ago. The church has grown from 15 people meeting for a Bible study in an apartment clubhouse on Thursday nights to several thousand people and five campuses in Franklin, Nashville, Nolensville, Columbia, and Haywood Hills. Jeff is a follower of Jesus, husband, and father of three wonderful children. He serves alongside an amazing staff team at Rolling Hills and is the President of Justice and Mercy International doing mission work in the countries of Moldova and the Amazon jungle. Jeff is an author and speaker while overseeing the ministry work with over 80 full-time church staff, 55 international staff, 70 learning center teachers, and multi-million-dollar budgets. Jeff is passionate about God's work and longs to make a difference for the glory of God in His day and generation.

Karl Vaters

Memorizing Scripture Devo 2025

08.22.2023

Steve Vandegriff

STEVE VANDEGRIFF (Liberty Baptist Theological Seminary) is a professor of youth ministries at Liberty University in Virginia. A former youth pastor, Steve enjoys ministering and speaking to young people and their parents. He previously spent thirteen years as the executive director of Youth for Christ in Alberta, Canada. He is co-author of Timeless Youth Ministry, Disturbing Behavior, and Protecting Your Teen from Disturbing Behaviors. The parents of three children, Steve and his wife, Pamela Jo, reside in Lynchburg, Virginia.

Heather Holleman

DR. HEATHER HOLLEMAN is an associate teaching professor of advanced writing at Penn State, speaker, and author. She has written ten books, including the bestseller Seated with Christ: Living Freely in a Culture of Comparison, the award-winning Sent: Living a Life That Invites Others to Jesus (cowritten with her husband, Ashley Holleman), and The Six Conversations: Pathways to Connecting in an Age of Isolation and Incivility. Heather serves with Faculty Commons in the professor ministry of Cru and blogs at www.HeatherHolleman.com.

Charles Stone

DR. CHARLES STONE (MDiv, DMin, PhD) has served for forty-three years in vocational ministry, thirty of those years as a senior pastor. He recently completed a nine-year role as lead pastor of West Park Church in London, Ontario, Canada, a multicultural congregation with over a thousand attendees. He has authored eight books and now serves as a coach-consultant to pastors and leaders. Over three hundred of his articles have appeared in magazines and online in publications such as Outreach Magazine, Leadership Journal, Pastors.com, SermonCentral.com, and Churchleaders.com. Charles and his wife, Sherryl, have been married for forty-five years and have three adult children and five grandchildren. You can reach him through his website at www.charlesstone.com.

Dr Issam Smeir

DR. ISSAM SMEIR is a Licensed Clinical Professional Counselor who specializes in trauma treatment for refugees, victims of torture, and severely abused and neglected children. He holds a Master's Degree in Clinical Psychology from Wheaton College and a Doctoral Degree in Counseling and Clinical Supervision from Northern Illinois University, and has done post doctorate training in trauma and refugee issues at Harvard University. He has worked for World Relief since 2001, serving refugees and other immigrants from dozens of countries of origin. Prior to joining World Relief, Issam worked with several missions and relief organizations. Originally from the country of Jordan, Issam now lives in Suburban Chicago with his wife and four sons.

John Van Sloten

JOHN VAN SLOTEN is a Calgary-based writer, teacher, and pastor who is passionate about helping people engage God everywhere. Over the past ten years he has preached dozens of creation/bible-based sermons on topics like radiation therapy, DNA repair mechanisms, river hydrology, chemical catalysts, tree branches, human knees, and the Giant Squid. John is a regular columnist with the Calgary Herald and his books include The Day Metallica Came to Church and Every Job a Parable. Over the past ten years, he has been awarded three John Templeton Foundation subgrants for preaching science, has been part of an Ambrose Seminary Science for Seminaries, and has been a Sinai and Synapses fellow. www.johnvansloten.com

St Augustine

AUGUSTINE OF HIPPO (354-430) was one of the foremost philosopher-theologians of early Christianity and the leading figure in the church of North Africa. He became bishop of Hippo in 396 and held that position until his death. Before becoming a Christian, Augustine lived a very secular life. His mother Monica prayed for him diligently and at age 32, during a trip to Milan, Augustine heard the preaching of St. Ambrose, was convicted by the Holy Spirit, and became a Christian. His numerous written works, the most important of which are his Confessions and City of God, shaped the practice of biblical exegesis and helped lay the foundation for much of medieval and modern Christian thought.

G. K. Chesterton

GILBERT KEITH CHESTERTON (1874-1936) is the author of 100 books, including Orthodoxy and The Everlasting Man, which led young atheist C.S. Lewis to become a Christian. He is probably best known for his series about the priest-detective Father Brown and was also known as a poet and a playwright. In spite of his literary accomplishments, he primarily considered himself a journalist, writing over 4,000 newspaper essays for papers such as Illustrated London News and Daily News, as well as his own G. K.’s Weekly.

Gary Keisling

Dr. Gary Keisling is the senior pastor of The Alliance Church in Bryan, Ohio. He has served in pastoral ministry with The Christian and Missionary Alliance for more than 25 years. He is also a professor with Crown College on-line. He and his wife Susan have been married for more than 35 years and have two grown children.

Jim Killam

JIM KILLAM has been a journalist for more than 30 years -- including stints as a newspaper reporter and editor, a college media adviser, and a missionary journalist. Currently he is Story Director for the Seed Company, a Wycliffe affiliate. Jim and his wife, Lauren, live in Texas, though their Midwestern accents give them away quickly. They have three grown children and two grandchildren. Go Tell It is Jim's third book, and has led to training opportunities on three continents.

James T. Meeks

REVEREND JAMES T. MEEKS (B.A., Bishop College) is the founder and senior pastor of Salem Baptist Church in Chicago’s Roseland community. With over 20,000 members, Salem is the largest African American church in Illinois and one of the fastest growing in the nation. He also serves as the joint chairman for the Illinois Legislative Black Caucus and as an Illinois State Senator for the 15th Legislative District. Rev. Meeks is the author of How to get Out of Debt and Into Praise and Life-Changing Relationships. He and his wife, Jamell, reside in Chicago and are the proud parents of four children.