Acharya Prashant explains that thoughts are not autonomous; they are dependent phenomena tied to the ego, which acts as their center. The primary function of thought is to secure and protect the ego's perceived self-interest. Consequently, a person's thinking process is designed to maintain their current psychological state rather than fundamentally changing the thinker. He emphasizes that mere thinking does not transform the individual; transformation only occurs through the observation of the entire process of thinking from the position of a witness. Without this witnessing, the thinker remains trapped in a cycle where they avoid any thoughts that might challenge their core identity.