The purpose of cognitive behavioral therapy (CBT) is to change the way we think and the behaviors associated with our thought processes. In stressful situations, intrusive thoughts automatically come to mind that greatly affect the mood and emotions in the situation. This can cause someone to overreact, feel ill, or become upset. This is due to making false assumptions about the meaning of the circumstance based on an unreliable, subjective truth. During CBT, clients learn to recognize and change disruptive thought processes that lead to negative emotions and destructive behaviors. The way we think is like wearing glasses that make us see the whole world in a certain light. This type of therapy increases our awareness of how we perceive things and we learn how to shape our reality with our thoughts and behavior. Ultimately, we all shape our world ourselves.