How C. S. Lewis Changed His Mind About Atheism | With Alister McGrath
Alister McGrath
28.01
19 December 2025
23 December 2025
How does an atheist Oxford professor become a Christian?
** PART 1 of a 4-episode mini-series on C. S. Lewis with Professor Alister McGrath **
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In this conversation, Samuel Marusca and Oxford Professor Alister McGrath @alistermcgrathchristianthe1158 unpack how C. S. Lewis moved from confident atheism to reluctant theism and, finally, to Christian conviction. We explore the pressures that forced Lewis to rethink his worldview: the demands of reason, the pull of imagination, the problem of meaning, and the limits of a purely material account of life.
Alister McGrath is Oxford scholar, former atheist, and one of Lewis’s most authoritative biographers, explains why Lewis ultimately judged atheism to be “too thin” to explain morality, longing, beauty, and truth. He discusses Lewis’s friendships (Tolkien, Dyson), his work as a tutor at Oxford, and the gradual intellectual crisis that pushed him toward belief.
You can explore Alister McGrath's major study of Lewis here:
C. S. Lewis – A Life: Eccentric Genius, Reluctant Prophet: https://amzn.eu/d/er1quYf
** This video was produced for the C. S. Lewis Conference in Iași, Romania. Many thanks to the organisers for their brilliant work @cslksiasi **
You can find out more about their work here: https://iasi.cslks.ro/ and also on their social media: https://www.facebook.com/C.S.LewisConferenceIasiRomania
Thanks to our brilliant award winning video producer @medialux.
Summary:
00:01 Lewis the atheist academic at Oxford
02:05 Why Lewis became a Christian
05:12 The role of imagination, myth, and literature in opening the mind
09:40 What Surprised by Joy really reveals about his conversion
14:55 How Mere Christianity still shapes skeptical audiences
19:48 Why Lewis remains central to debates about reason and faith today
Recorded in beautiful #oxford on a crisp, autumn day.
#christianity #motivational #cslewis #practicalwisdom #atheism #apologetics
Stripe License: HCMGGEW4C0S6GCAH
