Gospel in Life
with Tim Keller
The Battle for the Mind
Wednesday, February 18, 2026
Many Western people today think that Christianity is for people who don’t want to use their minds, that if you’re educated and thoughtful you wouldn’t believe. They think that to be Christian you’d have to jettison your thoughts and surrender to a realm of feeling, to a leap of faith.
But the Bible tells us the opposite. In 1 Peter, when it calls us to holiness, it says we must prepare our minds. Holiness includes the whole person—including the mind. In fact what Peter says and what it says all through the Bible is not only “May Christians think,” but “Christians must think.” It’s fundamental.
Let’s look at how 1 Peter shows us that 1) Christianity requires you to use your mind, to be thinking and rational, and 2) Christianity is the only thing that really encourages thinking and gives a basis for it.
This sermon was preached by Dr. Timothy Keller at Redeemer Presbyterian Church on October 24, 1993. Series: Splendor in the Furnace: 1 Peter, Part 1. Scripture: 1 Peter 1:13-16.
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