“Part of the unpleasant side of The Pilgrim’s Progress lies in the extreme narrowness and exclusiveness of Bunyan’s religious outlook. The faith is limited ‘to one small sect and all are damned beside’. But I suppose that all who read old books have learned somehow or other to make historical allowances for that sort of thing. Our ancestors all wrote and thought like that. The insolence and self-righteousness which now flourish most noticeably in literary circles then found their chief expression in theology, and this is no doubt a change for the better. And one must remember that Bunyan was a persecuted and slandered man” (C.S. Lewis, Selected Literary Essays, p. 152).