From Robert Louis Stevenson’s essay “The Books Which Have Influenced Me”:
I come next to Whitman’s Leaves of Grass, a book of singular service, a book which tumbled the world upside down for me, blew into space a thousand cobwebs of genteel and ethical illusion, and, having thus shaken my tabernacle of lies, set me back again upon a strong foundation of all the original and manly virtues. But it is, once more, only a book for those who have the gift of reading. I will be very frank–I believe it is so with all good books except, perhaps, fiction. The average man lives, and must live, so wholly in convention, that gun-powder charges of the truth are more apt to discompose than to invigorate his creed. Either he cries out upon blasphemy and indecency, and crouches the closer round that little idol of part-truths and part-conveniences which is the contemporary deity, or he is convinced by what is new, forgets what is old, and becomes truly blasphemous and indecent himself. New truth is only useful to supplement the old; rough truth is only wanted to expand, not to destroy, our civil and often elegant conventions. He who cannot judge had better stick to fiction and the daily papers. There he will get little harm, and, in the first at least, some good.