Tim Keller (1950–2023) was a respected pastor, theologian, and author who profoundly shaped modern Christian thought and practice. He founded Redeemer Presbyterian Church in New York City in 1989, which became a model for urban church ministry and sparked a movement of church planting in global cities. Keller authored numerous books, including The Reason for God, The Prodigal God, and Center Church, which explored Christianity’s relevance in contemporary culture. Known for his intellectual rigor, cultural engagement, and gospel-centered teaching, Keller co-founded The Gospel Coalition, a network aimed at equipping pastors and churches. Beyond his public ministry, he was admired for his humility, clarity of thought, and deep commitment to both truth and grace. Diagnosed with pancreatic cancer in 2020, Keller continued to write and speak until his death in May 2023, leaving behind a legacy that continues to influence churches, pastors, and believers worldwide.