Mere Christianity by C.S. Lewis

C. S. Lewis (1898–1963) was a British writer and professor at Oxford and Cambridge who spent most of his early life as a convinced atheist. His conversion to Christianity in his early thirties came reluctantly — he later called himself "the most dejected and reluctant convert in all England." That honest resistance to faith became the hallmark of his writing. In books like Mere Christianity, The Screwtape Letters, and The Problem of Pain, Lewis made the case for Christian belief with clarity, wit, and a refusal to dodge hard questions. He's equally beloved for The Chronicles of Narnia, which brought the same ideas to life through story. What makes Lewis endure is his voice: warm but rigorous, imaginative but grounded, and always written for ordinary people rather than academics. He remains one of the most widely read Christian thinkers of the last century.

Lewis delivered the original talks as a series of BBC radio broadcasts between 1941 and 1944, while Britain was enduring the Blitz and the grinding uncertainty of the Second World War. The BBC invited him not as a clergyman but as a layman — a professor who had once been an atheist and could speak to doubt honestly. The talks were heard by millions and published in three separate pamphlets before Lewis revised and combined them into Mere Christianity in 1952. The wartime origin matters: Lewis was writing for people who needed real answers under real pressure, and that urgency still comes through on every page.

Mere Christianity began as talks for a nation in crisis, but the questions Lewis took on — Is there a moral law? What does it point to? Who was Jesus, really? — are the same questions people in midtown Manhattan wrestle with over coffee and on the subway. Lewis deliberately avoided denominational controversies, focusing instead on what he called "mere" Christianity: the core beliefs that Catholics, Protestants, and Orthodox Christians have held in common for two thousand years. The book has remained in print for over eighty years because Lewis writes the way the best conversations feel: direct, intelligent, and unafraid of hard questions. It remains one of the finest introductions to Christian faith for skeptics and believers alike.

Our community includes people at very different places in their spiritual journey — longtime believers, honest skeptics, and everyone in between. Lewis is one of the rare writers who speaks to all of them at the same time. Because he was an atheist before he was a Christian, he never talks down to doubt; he engages it with charity, intellectual honesty, and genuine respect. Skeptics find in Lewis a conversation partner who takes their objections seriously rather than brushing them aside. At the same time, believers find that Lewis gives them a stronger, more articulate foundation for what they already hold to be true — the kind of clarity that deepens conviction and equips you to talk about faith with the people in your life. That's exactly the kind of Christ-centered conversation we want to foster at City on a Hill, and Mere Christianity is the perfect text to do it around.