The doctrinal principles and practical branches are fundamental pillars of Islam, with the branches of religion playing a key role in shaping the lifestyle of Muslims. These concepts have been formulated by Islamic theologians and jurists, based on the primary sources of the religion, including the Qur'an, the Sunnah, and reason. However, the interpretive and contractual nature of this division raises fundamental questions: Has the categorization of the branches of religion, with a focus on acts of worship such as prayer, fasting, and pilgrimage, succeeded in bringing the lives of Muslims closer to the teachings of pure Qur'anic Islam and the tradition of Prophet Muhammad? Has the absence of ethical principles such as justice, honesty, fulfilling promises, and charity in the list of religious branches not had a negative impact on the lifestyle of Muslims? This research, using a descriptive-analytical method, addresses these questions. The findings suggest that the focus on acts of worship in determining the branches of religion has led to a worship-centered lifestyle for Muslims, while ethical principles, which hold a fundamental place in Qur'anic and narrational teachings, have been marginalized. This neglect has led to a weakening of ethical components in the lifestyle of Muslims and the emergence of ethical crises in Islamic societies. This study emphasizes the need to reconsider the list of religious branches and suggests that ethical principles be considered as part of the branches of religion in order to align the lifestyle of Shia Muslims more closely with the goals of the Qur'an and the tradition of the Prophet of Islam