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Shiavault - a Vault of Shia Islamic Books Islamic Doctrines Simplified Imamate Islam pays particular importance to leadership (Imamate *).*** During the Prophet's glorious life, he himself was the leader and chief of the Muslims, in addition to his being a Prophet and a preacher of Allah, the Most High.
Allah, the Almighty says: “Only Allah, your Guardian and His Messenger and those who have faith, those who keep up prayer and pay poor-rates (zakat) while they bow.” [^1] Holy Qur'an (5:55) Many scholars and other exegists and compilers of the Prophet's traditions, among them Zamakhshari and Wahidi, have stated that this verse was revealed in favour of Imam Ali [a], and declares his appointment by making it clear that he is the vicegerent of Muslims.
The Messenger of Allah [s], on his farewell pilgrimage, when holding Imam Ali's hand told ten thousand Muslims who were present there: “Do I not have more authority over you than you on yourselves?” When they replied: “Yes, surely” , then the Holy Prophet declared: “ O faithful! For whomever I am his master and the authority whom he obeys: Ali will be his master. O Allah!
Be friendly towards the friends of Ali; help those who help him, and hinder those who hinder him, and may the truth always be with him.” [^2] This opinion is further supported by the Messenger's sermon: “I leave two great, precious things among you, the Book of Allah and my Household (Ahlul Bayt). If you keep hold of both of them, you will never go astray after me. One of them is greater than the other the Book of Allah is like a rope hanging from heaven to earth.
Indeed, the existence of an Islamic state headed by an Imam (leader) committed to Islamic principles is not only a necessity but is also a legal obligation.