The reality of Deen is to subjugate our desire and feelings to commandments of Allah. Only to understand the technicalities of the laws of Deen is not Deen. The Ulama of the Jews understood the propositions (masaa´il) of their syariat well but did not suppress their own whims to the orders of Allah. They therefore deserved the wrath of Allah and were rejected. So by means know the whole ilm of Deen, understand the propositions of Deen, remembering each word from the Holy Book but without bring the Deen and the syariat of the Deen in the life, the person still dont get the reality of Deen. There were a number of kitab (Holy Book) and the suhuf, where-in so much knowledge of the law of Allah, have send to Book-people (Ahli-Kitab), but still their deny their prophet, make things againts the law of their Deen, and even change the Deen law accordings their desire, until such stage that Allah have reject their faith. And as Allah have send prophet Muhamad s.a.w, with the Deen of Islam, as that, the only way to understand and get the reality of Deen which promise the succes in worldly and hereafter is lay by follow the order of Allah, in the way show by Prophet Muhamad s.a.w.
