James Hamilton, Life of Bunyan
“ Though not the truth, an illustration is a stepping-stone towards it; an indentation in the rock which makes it easier to climb. No man had a happier knack in hewing out these notches in the cliff, and no one knew better where to place them, than this pilgrim’s pioneer. Besides, he rightly judged that the value of these suggestive similes—these illustrative stepping-stones—depends very much on their breadth and frequency. But Bunyan appeals not only to the intellect and imagination, but to the hearts of men. There was no bitterness in Bunyan. ”
