Beliefs

A belief system is a set of mutually supportive beliefs. The beliefs of any such system can be classified as religious, philosophical, ideological, or a combination of these. Philosopher Jonathan Glover says that beliefs are always part of a belief system, and that belief systems are difficult to completely revise.http://en.wikipedia.org/wiki/Belief_system

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In decision theory and general systems theory, a mindset is a set of assumptions, methods, or notations held by one or more people or groups of people that is so established that it creates a powerful incentive within these people or groups to continue to adopt or accept prior behaviors, choices, or tools. http://en.wikipedia.org/wiki/Mindset

Self-Identity | Group-Identity | Argumentation