I try not to think with my gut. If I’m serious about understanding the world, thinking with anything besides my brain, as tempting as that might be, is likely to get me into trouble. Really, it’s okay to reserve judgment until the evidence is in.

Carl Sagan, The marriage of skepticism and wonder, in Carl Sagan (ed.) The Demon-Haunted World: Science as a Candle in the Dark, London, 1996, pp. 277–289, p. 170