 In discussing the mark of truth, Descartes suggested that the human intellect is generally reliable because it was created by God. In discussing the functioning of the senses to preserve or maintain the body, he explained that God has arranged the rules of mind–body interaction in such a manner as to produce sensations that generally are conducive to the good of the body. Nonetheless, in each case, errors occur. In various circumstances, our judgments may be false (often, about sensory things), just as, more broadly, human beings make poor moral choices, even though God has given them a will that is intrinsically drawn to the good (1:366, 5:159, Princ. I.42). In addition, our sense perceptions may represent things as being a certain way, when they are not. Sometimes we feel pain because a nerve has been damaged somewhere along its length, and yet there is no tissue damage at the place in which the pain is felt.  Amputees may feel pain in their fingers when they have no fingers (Princ. IV.196).