The study of the Prophet of Islam (PBUH) and the great leaders of Islam, both Shi'a and Sunni, help us to reach a common view on the limits of Islam and faith, and the laws and laws that are applied to Muslims from different sects of Islam and disbelievers. he does. Therefore, it is imperative that the criteria of Islam and disbelief be examined in order to eliminate the misleading beliefs of the Islamic distinction towards each other. In this paper, we have tried to examine topics such as the characteristics and limitations of Islam and disbelief in terms of the Persian point of view, the Prophetic and Takfir masses of Muslims, the apparent Islam's sufficiency, the viewpoint of the jurisprudents of the Takfir of the Faqihs, and the views of the takfiris who, according to all the Muslims, Reject and criticize wisely.
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