Alan Jacobs, in his book, The Narnian: The Life and Imagination of C. S. Lewis (242):
Objections to Christianity…are phrased in words, but that does not mean that they are really a matter of language and analysis and argument. Words are tokens of the will. If something stronger than language were available, then we would use it. But by the same token, words in defense of Christianity miss the mark as well: they are a translation into the dispassionate language of argument something that resides far deeper in the caverns of volition, of commitment. Perhaps this is why Saint Francis, so the story goes, instructed his followers to ‘preach the Gospel always, using words if necessary.’ It is not simply straight-forwardly wrong to make arguments in defense of the Christian faith, but it is a relatively superficial activity: it fails to address the core issues.