The definition of critical thinking is the art if analysing and evaluate thinking with a view to improving , it is self-directed, self-disciplined , self-monitored ,and self-corrective thinking . It requires rigorous standards of excellence and mindful command of their use. It entails effective communication and problem solving abilities and a commitment to overcome our limited outlook. This document will explain the difference between, beliefs, attitudes and values.It will show in depth critical assessment to evaluate how someone with different beliefs, attitudes and values might interpret the theory differently. The difference between beliefs, attitudes and values. Beliefs are the assumptions we make about ourselves, about others in the world and about how we expect things to be. Beliefs are about how we think things really are, and a firmly held opinion. A belief is an internal feeling that something is true, even though that belief may be unproven or irrational. eg I believe that crossing a black cat brings bad luck, or I believe that there is life after death.Beliefs tend to be deep set and our values stem from our beliefs. Values are about how we have learnt to think things ought to be or people ought to behave, especially in terms of qualities such as honesty, integrity and openness which when people are asked what are their values tend to be the main values. Generally speaking, values are much more stable (and difficult to influence) than beliefs and attitudes Values usually stem from the way we have been raised and guided by our peers. Attitudes are the established ways of responding to people and situations that we have learned, based on the beliefs, values and assumptions we hold.How we respond to situation and our behaviour can reflect our attitude. However we can control our behaviour in the away that does not reflect our beliefs and values. Which in order to embrace a diverse culture and behaviours as a successful manager we have to adapt out behaviour in a positive manner. Attitudes will differ depending on the situation, mood and who we are responding to . For example if a colleague and a friend have the same problem then attitude to the same problem will change as relationships are not the same.