إِنِّي أَعْلَمُ مَا لاَ تَعْلَمُونَ
(I know that which you do not know) if your inhabiting the heavens is better, or worse for you.'' Ar-Razi as well as others said this. Allah knows best. Â Al-Qurtubi, as well as other scholars, said that this Ayah (2:30) proves the obligation of appointing a Khalifah to pass judgements on matters of dispute between people, to aid the oppressed against the oppressor, to implement the Islamic penal code and to forbid evil. There are many other tasks that can only be fulfilled by appointing the Imam, and what is necessary in performing an obligation, is an obligation itself. We should state here that Imamah occurs by either naming a successor, as a group among Ahl As-Sunnah scholars said occurred - by the Prophet - in the case of Abu Bakr, or hinting to a successor. Or, the current Khalifah names a certain person as Khalifah after him, as Abu Bakr did with `Umar. Or, the Khalifah might leave the matter in the hands of the Muslim consultative council, or a group of righteous men, just as `Umar did. Or, the people of authority could gather around a certain person to whom they give the pledge of allegiance, or they could select one among them to choose the candidate, according to the majority of the scholars. The Khalifah must be a responsible adult Muslim male, able to perform Ijtihad (independent legal judgments), bodily able, righteous, with knowledge of warfare, politics. He also must be from the tribe of Quraysh, according to the correct view, but it is not necessary that he be from the tribe of Bani Hashim, or that he be immune from error, as the Rafidah (Shiites) falsely claim. When the Khalifah becomes an immoral person (Fasiq), should he be impeached There is disagreement over this matter, but the correct view is that he is not to be removed, because the Messenger of Allah said,