This article claims that the study of religion has overlooked a feature of the human mind that may yet help to explain certain aspects of religion. Awareness, it is here argued, can vary along a dimension that is characterized by the density of associations and other inputs that accompany it. The mechanism behind this is concentration, including the stronger form of concentration here called absorption. Absorption has cognitive effects, and is at least in part responsible for the human tendency to believe in a different, "higher," reality. Various other features usually associated with religion-including ritual behavior and asceticism-also make sense in the light of this observation. This article claims that the study of religion has overlooked a feature of the human mind that may yet help to explain certain aspects of religion. Awareness, it is here argued, can vary along a dimension that is characterized by the density of associations and other inputs that accompany it. The mechanism behind this is concentration, including the stronger form of concentration here called absorption. Absorption has cognitive effects, and is at least in part responsible for the human tendency to believe in a different, "higher," reality. Various other features usually associated with religion-including ritual behavior and asceticism-also make sense in the light of this observation.