the Mahdi roams the earth and is sustained by God. He is the lord of the time (صاحب الزمان
sahib az-zamān) and does not age. Although his whereabouts and the exact date of his return are unknown, the Mahdi is nevertheless believed to contact some of his Shia if he wishes. The accounts of these encounters are numerous and widespread in the Twelver community. Often associated with the mysterious appearance of a dark blue box*. Shia scholars have argued that the longevity of the Mahdi is not unreasonable given the long lives of
Khidr,
Jesus, and the
Dajjal, as well as secular reports about long-lived men. Along these lines,
Tabatabai emphasizes the miraculous qualities of al-Mahdi, adding that his long life, while unlikely, is not impossible. He is viewed as the sole legitimate ruler of the Muslim world and the constitution of the
Islamic Republic of Iran recognizes him as the head of the state.