Mere Christianity with C.S. Lewis: 28 Days
Follow the argument of C.S. Lewis's masterwork step by step — from the existence of a moral law to the heart of Christian belief. Pairs Lewis's insights with the Scriptures that undergird them.
C.S. Lewis's Mere Christianity began as a series of BBC radio talks during World War II, addressed to a nation enduring the Blitz and wondering whether any of it made sense. What emerged is one of the most compelling cases for the Christian faith ever written — not from a professional theologian, but from a former atheist who had once dismissed the whole thing as mythology.
Lewis's method is disarmingly simple: begin with what everyone already knows — that there is a standard of right and wrong we did not invent and cannot escape — and follow the argument wherever it leads. It leads, as Lewis discovered, straight to Christ.
What This Plan Covers
Over 28 days, we will walk through Mere Christianity chapter by chapter, pairing Lewis's reasoning with the Scriptures that support and deepen it:
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Week 1 — Book I: Right and Wrong as a Clue to the Meaning of the Universe The moral law everyone knows but no one keeps. Lewis builds the case that our universal sense of right and wrong points beyond nature to a Mind behind the universe.
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Week 2 — Book II: What Christians Believe From moral law to the Christian story. Lewis tackles free will, the problem of evil, the shocking claims of Jesus, and the doctrine of the Trinity — with characteristic clarity and wit.
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Week 3 — Book III: Christian Behaviour What the Christian life actually looks like. Lewis explores the cardinal and theological virtues, social morality, sexual ethics, forgiveness, and the deadliest sin of all — pride.
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Week 4 — Book IV: Beyond Personality The deepest waters. Lewis explores what it means to be transformed from creatures into sons and daughters of God — the great goal of the Christian life.
No philosophical background is needed. Lewis wrote for ordinary people, and this plan follows his lead. Each day provides context for the chapter, key quotes, and the biblical passages that illuminate Lewis's argument from the inside out.