xpediency has a fundamental role in ordinance of religious orders and religious orders follow the interests and the corruptions in their subjects. The reason in itself is unable in revealing the interests and corruptions in many cases and needs the expressions of the religion.
Governmental orders are issued by the ruler within the boundary
authorizing of the governmental orders depend on the expediency and expediency is held in its subject. An Islamic ruler orders within the framework expediency.
Expediency of the Islamic system, whether in policy or in action, has a direct relation with the safeguarding of the system. The safeguarding of the system is imaginable in tow areas: the first is guarding the system and preventing from the harms that may come from the enemies and the second is the establishment of the order in the society, creating organization and government departments and preventing from disorder and chaos. In jurists’ view, the safeguarding of the system in both meaning is not only obligatory in religion but also it is rationally necessary. Because, safeguarding of the Islamic system is a preliminary for protecting of the religion.
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