Abu Bashir says: When I asked Imam Jaffar Sadik:"O son of the Messenger of Allah (saas)! Who is the Qaim of your Ahl al-Bayt?" he replied: ... HAZRAT MAHDI (AS) WILL (SPIRITUALLY) CONQUER THE WORLD, the Prophet Jesus (as) son of Mary will pray behind him. AT THAT TIME THE WORLD WILL BE ILLUMINATED BY THE LIGHT OF ALLAH, AND EVERYWHERE IN WHICH AND EVERYWHERE IN WHICH BEINGS OTHER THAN ALLAH ARE WORSHIPPED WILL BECOME PLACES WHERE ALLAH IS WORSHIPED; AND EVEN IF THE POLYTHEISTS DO NOT WISH IT, THE ONLY FAITH ON THAT DAY WILL BE THE RELIGION OF ALLAH.”(Bihar al-Anwar, Vol. 51, p. 146)
The Prophet (saas) said to Hazrat Ali (ra): “YOU ARE THE FIRST, AND THE LAST IS HAZRAT MAHDI (AS), UPON WHOM ALLAH WILL BESTOW THE (SPIRITUAL) CONQUEST OF THE ENTIRE WORLD.” (Bihar al-Anwar, Vol. 52, p. 378)
HAZRAT MAHDI (AS) WILL (SPIRITUALLY) CONQUER THE EAST AND WEST OF THE WORLD AND BRING ISLAM(Islamic moral values) TO RULE ACROSS THE WORLD… Almighty Allah will give people such a power that everyone will hear his voice from where they are, and HAZRAT MAHDI (AS) WILL GIVE LIFE TO ISLAM…(Bihar al-Anwar, Vol. 52, p. 279 and Vol. 53, p. 12; Sheikh al-Saduq, Kamal al-Din, Vol. 2, p. 367)
"Those who act in haste will be destroyed, those who say his [Hazrat Mahdi’s (as)] coming is imminent will be saved, and this is rooted like the ramparts of a tower. A GREAT (SPIRITUAL) CONQUEST WILL TAKE PLACE AFTER SORROW.”(Sheikh Muhammad ibn Ibrahim Numani, al-Ghaybah al-Numani, p. 229)
