In a pure theocracy, the civil leader is believed to have a direct personal connection with the civilization's divinity. For example, Moses led the Israelites, and Muhammad ruled the early Muslims. Law proclaimed by the ruler is also considered a divine revelation, and hence the law of God. An ecclesiocracy, on the other hand, is a situation where the religious leaders assume a leading role in the state, but do not claim that they are instruments of divine revelation. For example, the prince-bishops of the European Middle Ages, where the bishop was also the temporal ruler. Such a state may use the administrative hierarchy of the religion for its own administration, or it may have two 'arms,' -- administrators and clergy—but with the state administrative hierarchy subordinate to the religious hierarchy. The papacy in the Papal States occupied a middle ground between theocracy and ecclesiocracy, since the pope did not claim he was a prophet who received revelation from God and translated it into civil law.
Theocracy is distinguished from other, secular forms of government that have a state religion, or are influenced by theological or moral concepts, and monarchies held "By the Grace of God". In the most common usage of the term, some civil rulers are leaders of the dominant religion (e.g., the Byzantine emperor as patron of the head of the official Church); the government claims to rule on behalf of God or a higher power, as specified by the local religion, and divine approval of government institutions and laws.
Secular governments can also coexist with a state religion or delegate some aspects of civil law to religious communities. For example, in Israel marriage is governed by officially recognized religious bodies who each provide marriage services for their respected adherents, yet no form of civil marriage (free of religion, for atheists, for example) exists nor marriage by non-recognized minority religions.