From G. K. Chesterton's The Everlasting Man
"[T]he next best thing to being really inside Christendom is to be really outside it. ... [T]he popular critics of Christianity are not really outside it. They are on a debatable ground, in every sense of the term. They are doubtful in their very doubts. Their criticism has taken on a curious tone; as of a random and illiterate heckling. ... Their whole atmosphere is the atmosphere of a reaction: sulks, perversity, petty criticism. They still live in the shadow of the faith and have lost the light of the faith."
HT: Bob Prokop