The mind is what thinks, feels, perceives, imagines, remembers, and wills, encompassing the totality of mental phenomena. It includes both conscious processes, through which an individual is aware of external and internal circumstances, and unconscious processes, which can influence an individual without intention or awareness. Traditionally, minds were often conceived as separate entities that can exist on their own but are more commonly understood as features or capacities of other entities in the contemporary discourse. The mind plays a central role in most aspects of human life but its exact nature is disputed; some theorists suggest that all mental phenomena are private and directly knowable, transform information, have the ability to refer to and represent other entities, or are dispositions to engage in behavior.