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As written in Al-Muwâfaqât Fi Ushûli Al-Syari'ah, Imâm Al-Shatibi explained that every divine law (the command of Allah) must be prescribed on purposes and objectives. The desired objective of law is to fulfill for the benefit of humankind. Imâm Al-Shatibi divided the higher objectives of law into two categories: (1) the objectives of the Lawgiver (Allah as the Lawgiver), and (2) the human objectives (the benefits that refer to human as the doer of Law). The human objectives are defined in three scales: from the ‘essential’ (dharûriyat), to the ‘necessary’ (hajiyât), and to the ‘complementary’ (tahsiniyât). Furthermore, Imam Al-Shatibi explained that there are four steps in understanding the human objectives. The first is understanding maqasid (the objectives) through the purity of the command and prohibitions. Second,it is understanding maqasid through the existence of ‘illah (basis) contained in commands and prohibitions. And the third, understanding the maqasid through the law that related to 'adah (habit) and 'ibadah (worship) which have the main and additional objectives. Fourth, understand the maqasid through silence due to the absence of any occasions or circumstances for further declaration related to the certain matter. In other word, for certain issue, there is no evidence from the Holy book that provides the reasons of the law implementation even though there is a meaning (ma’na) behind the revelation.
Ikhlas et al. (Sun,) studied this question.