The Life And Works Of William Cowper Comprising His Poems, Correspondence, And Translations With A Life Of The Author Book

"A startling thing in Lewis's letters to other believers is how much energy and practical advice is dispensed about how to keep your belief going: they are constantly writing to each other about the state of their beliefs, as chronic sinus sufferers might write to each other about the state of their noses. Keep your belief going, no matter what it takes'the thought not occurring that a belief that needs this much work to believe in isn't really a belief but a very strong desire to believe."

-Adam Gopnik

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the full quote you won't find on the back cover of Mere Christianity....

"C.S. Lewis is the ideal persuader for the half convinced, for the good man who would like to be a Christian but finds his intellect getting in the way."

― Anthony Burgess

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The excellent article from which the top quote comes....