C.S.Lewis: “A Christian doctrine never seems less real to me than when I have just been defending it.”
“I envy you not having to think any more about Christian apologetics. My correspondents force the subject on me again and again. It is very wearing, and not v. good for one’s own faith. A Christian doctrine never seems less real to me than when I have just (even if successfully) been defending it. It is particularly tormenting when those who were converted by my books begin to relapse and raise new difficulties.”
– C. S. Lewis, in a letter to Mary Van Deusen, on 18 June 1956, found in The Collected Letters of C. S. Lewis, Volume III, page 762.