Talking of constitutional melancholy, he observed, “A man so afflicted, Sir, must divert distressing thoughts, and not combat with them.” BOSWELL: “May not he think them down, Sir?” JOHNSON: “No, Sir. To attempt to THINK THEM DOWN is madness. He should have a lamp constantly burning in his bed-chamber during the night, and if wakefully disturbed, take a book, and read, and compose himself to rest…”

—Boswell’s Life Of Johnson
 

James McNeill Whistler, Reading in Bed (The Slipper) (1858)