Abstract: Beliefs are people's maps of the world. They are passive and involuntary; agents have infallible beliefs about their own beliefs, but only fallible beliefs about the beliefs of others. All other mental events, such as memories and emotions, can be analysed in terms of the five components of the mental life – sensations, thoughts, and purposes (which are all conscious events in that we are aware of them while we have them) and beliefs and desires (which are both mental states that continue and we are unaware of them).

Keywords: belief, emotion, fallible, Hume, infallible, David Lewis, memory, Searle,