The document describes the cognitive behavioral therapy (CBT) concept of the cognitive triangle, which explains the interconnected relationship between thoughts, feelings, and behaviors. It provides an example of how negative thoughts about a presentation can lead to increased anxiety and poor performance during the presentation, reinforcing the initial negative thoughts. The cycle of negative thoughts influencing negative feelings and behaviors that then influence more negative thoughts can repeat continuously without intervention. CBT aims to break this cycle by challenging distorted thoughts and developing more balanced perspectives.