When Jesus taught, he used parables. The kingdom of God is like yeast, a net, a pearl. Then and today, to grasp wisdom and spiritual insight, we need the concrete. We need stories. In this issue of Christianity Today, we focus on testimony—the stories we tell, hear, and proclaim about God’s redemptive work in the world. Testimony is a personal application of the Good News. You’ll read Marvin Olasky’s testimony from Communism to Christ, Jen Wilkin’s call to biblical literacy, and a profile on the friendship between theologian Miroslav Volf and poet Christian Wiman. In an essay on pickleball, David Zahl reminds us that play is also a testament to God’s grace. As you read, we hope you’ll apply the truths of the gospel in your own life, church, and neighborhood. May your life be a testimony to the reality of God’s kingdom.