In the episode, the host cited a passage from the book while discussing how a momentary affliction was outweighed by the eternal weight of glory, linking it to a sermon by C.S. Lewis. The reference served to illustrate a theological point rather than to promote the title, and no explicit endorsement was given.
Episode: The Sandals of Peace (Part 2)
It's the hope of that and the knowledge of that and the feeding on that and the meditation on that that Paul says makes this 39 lashes, the fact that my back has been ripped up and will probably never heal, this slight momentary affliction is outweighed by eternal weight of glory.
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It's from the sermon, The Weight of Glory by C.S. Lewis.