“Fine feelings, new insights, greater interest in ‘religion’ mean nothing unless they make our actual behaviour better; just as in illness, ‘feeling better’ is not much good if the thermometer shows that your temperature is still going up. In that sense the outer world is quite right to judge Christianity by its results. Christ told us to judge by results…Our careless lives set the outer world talking; and we give them grounds for talking in a way that throws doubt on the truth of Christianity.”
C.S. Lewis, Mere Christianity, HarperSanFrancisco – A Division of HarperCollinsPublishers, (c) 1952, pp. 207-208.