Islam
Imam rules by right of divine appointment and holds "absolute spiritual authority" among
Muslims, having final say in matters of doctrine and revelation. Although the Shi'a share
many core practices with the Sunni, the two branches disagree over the proper importance
and validity of specific collections of hadith. The Shi'a follow a legal tradition called Ja'fari
jurisprudence. Shi'a Islam has several branches, the largest of which is the Twelvers, while
the others are the Ismaili, the Seveners, and the Zaidiyyah.
Sufism
Not strictly a denomination, Sufism is a mysticalascetic form of Islam. By focusing on the
more spiritual aspects of religion, Sufis strive to obtain direct experience of God by making
use of "intuitive and emotional faculties" that one must be trained to use. Sufism and Islamic
law are usually considered to be complementary, although Sufism has been criticized by
some Muslims for being an unjustified religious innovation. Most Sufi orders, or tariqas, can
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