You are the Proof ( hujjah )...

You are the Proof ( hujjah ), son of a proof and the brother of a proof; you will be the father of nine proofs of whom the ninth will be the qā'im (one who will establish the divine rule on this earth).” The Length of al-Mahdi’s Life We believe that the lengthening of a man's life is not an impossibility, because it is explicitly stated in the Qur'ān that, “We sent Nuh to his people and so he lived among them a thousand years, all but fifty.” (29:14) Even modern science does not deny the possibility of lengthening the human lifespan.

If a greatly extended life is not an impossible event, there is nothing to prevent God from keeping a man alive for thousands of years because the regulations of a man's life is in the hands of God. He can bring a new order into existence which has precedence over the usual order of things, just as He did in the case of all the miracles.

The miracles of the prophets: the cooling of the fire for Ibrahim, the turning of Musa’s staff into a serpent; bringing the dead to life through `Isa, and so forth, are all against the usual flow of things but God brought another order into existence by His own power and a miracle occurred. All the Muslims, the Jews and the Christians believe in these miracles. Similarly, for the length of the life of Imam Mahdi, there remains…