We have no respect for a surgeon who goes in but does not cut deeply enough to cure nor a patient who backs out of an operation because it may hurt; yet people can go through their whole lives attending church, listening to searching exposures of human sin, without ever taking it to themselves, or meeting anyone with skill and concern enough to lay the challenge right in their own laps.
—Experiment of Faith (New York: Harper&Row, 1957), p.22 (emphasis mine)