 In chapter 2 of Leviathan Hobbes comes to these topics at a slightly surprising point. In the course of discussing the workings of imagination, he talks naturally enough about dreams. Emphasizing the occasional difficulty of distinguishing dreams from waking life, he turns to talk of visions. Dreams had in stressful circumstances, when one sleeps briefly, are sometimes taken as visions, Hobbes says. He uses this to explain a supposed vision had by Marcus Brutus, and also widespread belief in ghosts, goblins, and the like. Later he uses it to account for visions of God (Hobbes 1651, 32.6). And Hobbes explicitly uses this to undermine the plausibility of claims to know things because told by God: