C.S. Lewis saves what might be his most ambitious section for last. Book IV, Beyond Personality: or First Steps in the Doctrine of the Trinity, tackles the Trinity, the nature of time, and what it means to become a Christian — not just a nicer person, but a fundamentally new kind of human being.
What's in Book IV Lewis opens by distinguishing between making and begetting — a move that sets Jesus apart from the rest of humanity. From there, he uses dimensions for understanding the Trinity, then pivots to one of the book's most striking ideas: God exists entirely outside our linear experience of time. Every moment — past, future, and present — is simultaneously visible to God. This is far more interesting than predetermination.
In the second half, Lewis argues that Christianity spreads like an infection — a good one — and that pretending to be good is actually how you start becoming good. He closes with a vision of humanity not just improved, but entirely remade: a new evolution, but one you have to choose.
What we loved The chapter on time hit hard. The standard answer to "what happens after death?" is an extended version of the life we already have — but Lewis shifts that thinking entirely. The Kingdom of God isn't a longer line, it's the whole page. This reframe has implications for how God could know our choices without determining them, and we realize that C.S. Lewis comes up with this from a long line of similar thought – this same understanding can be found in the Holy Eucharist and in the architecture of cathedrals.
The "Nice People" chapter also generated a lot of discussion. It's essential reading for anyone who's been burned by the institutional church or walked away because of the hypocrites in the pews. Lewis's point: Christianity was never about producing nice people. It's about a new creation. And ironically, those who consider themselves "already good" may have the hardest road ahead.
The opening defense of theology as a discipline landed for us too. Personal experience matters — but theology is the accumulated map of everyone's experiences before yours. Dismissing it means navigating without the map.
What gave us pause Lewis's treatment of the Lord's Prayer feels forced, shoehorning his "pretending" concept in a way that doesn't quite hold up. His misogyny is also real — even accounting for his era, you have to actively read aroundn it. His claim that you alone can stop God's work in your life runs against Paul's argument in Romans 8. If Christ is truly Lord of all, the human will seems like a pretty small obstacle. (Interestingly, Lewis handles this better in his fiction than in his theology.)
Our rating: 3 out of 5 — Brilliant in places, dated in others, and probably due for a modern rewrite.
If you want to keep reading:
- Being Christian — N.T. Wright
- Help My Unbelief — Fleming Rutledge (sermons; very much in the spirit of this book)
- The Reason for God — Tim Keller (recommended with some reservation)
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