Muslims throughout the world eagerly await the arrival of Imam Mahdi, this is because Imam Mahdi will restore justice and equality in the world, and help to unite the Muslims.  It is therefore not surprising, that many Muslims are perhaps a little impatient with regard to the emergence of Imam Mahdi.

The strong believe of the Shi´a religious community in the appearance of the Mahdi (a.s.) has propitiated hope and inspiration to them to accept the responsibility of taking the necessary steps to accomplish all changes
needed before his appearance.

The Glorious Quran has alluded not only to the reversion of the Muslims after the Prophet’s demise, but also to the attributes of the rightly guided Imams who will follow him. The Prophet of Islam foretold their names. Explaining their role complement his, he prophesized their coming.

Ayatollah Sayyid Ali Husaini Sistani was born on 9th Rabi Al-Awwal 1349 A.H. in the holy city of Mashhad. He was named Ali after his grandfather.
He was brought up into a family known for its religious background.

The sage leader is an eminent faqih and erudite in biography and criticism of traditionists, history and literary. And in addition to his profound job, he teaches the highstage in Fiqh and had many remarkabl]e compilations in various subjects too.

He was born in 1921 in Mashhad. Having finished the literature lessons, he learned the Sotouh stage from the late Ayatullah Haj Shaykh Muhammad Nahawandi, then he attended the lectures of the Kharij stage of the late Ayatullah Mirza Mehdi Isfahani and Ayatullah Ashtiyani.

A prominent theologian in Qom's Seminary who teaches Jurisprudence and its Principles at the higher level. He has compiled many books among them is a well- known exigesis of the Holy Qur'an entitled Nemouneh.

Ayatollah Safi was born in Gulpaaygaan on the 19^th of Jumadal Awwal 1337 AH (1918). His father was an eminent scholar who has written many famous books.

Sayyid Zanjani was born in 1928 in the city of Qom. He was born into a family known for its religious background. His father, Sayyid Ahmad Zanjani, was a pious and eminent scholar of the Islamic Seminary of Qom.

A distinguished scholar in the Qom Seminary. Besides Jurisprudence and its Principles, he is also famous for his expertise in history and theological studies, and has established a great institute for theological research.

Due to the severe restrictions imposed by the reigning Caliph, Imam Mahdi (a.s.) was forced to conceal himself from the eyes of the people. In the initial stages of the minor occultation, some very special and selected people among the Shias had the permission to meet their master whenever the need arose. They presented the problems of the Shias in the service of Imam who provided answers to them and conveyed them back to the people.

When Imam Hasan al-'Askari ( a.s.) died, the office of Divine Leadership (Imamate) was transferred to the Last Luminous Pearl of the Household of the Holy Prophet, Imam al-Mahdi (a.s.) Although His Eminence did not appear amongst the people, some persons in whom he had trust and confidence were allowed to visit him and present him the problems and questions of the Shi'ites And they communicated to the people the