Editorial note — Chapter X

[Footnote 50: These are the four grades expressing the importance of the commandments of Islam. Farz means the duty enjoined by God through the Prophet; Sünnet, the tradition emanating from the Prophet himself without Divine inspiration. The latter two words, Vadjib and Mustahab, signify ordinances originating with more recent interpreters of the Koran; the former being obligatory, the latter discretionary.]