This research examines the process of becoming a Shia school from the perspective of Islamic philosophy and mysticism. The findings show that cognitive dissonance, that is, encountering new information and experiences that conflict with previous beliefs, prompts a person to revise their beliefs. In the process of Istbasar, a person first resolves misunderstandings and skepticism towards Shiism and then gets acquainted with its main teachings. After the formation of a sense of interest and optimism, a person gradually moves towards accepting Shiism by rationally analyzing Shiite teachings and mystical experiences. Eventually, it may reach full acceptance of Shiism or remain in the interest phase.

This article has only examined the teachings of philosophers and mystics such as Al-Farabi, Ibn Sina, Suhrawardi and Ibn Arabi, who are known by some to be Sunnis, so that only the views respected by Sunnis are used in the process of istbasar. Concepts such as existentialism, theology, the combination of reason and mysticism, and the rational explanation of the concepts of revelation, prophecy and imamate in the works of these philosophers are consistent with Shiite teachings and help the process of insight in a person. Islamic mysticism, especially Ibn Arabi's teachings about the perfect human being and guardianship, plays an effective role in strengthening the spiritual tendencies towards Shiism.

The findings of the research show that the process of clairvoyance is not only a change of belief but also a transformation in personal and social identity and requires cognitive, spiritual and social support.