In the following statement...
In the following statement, God, the Exalted, indicates that man is unable to establish justice and determine the rules of a just judiciary with the sole means of the intellect that has been given him: "Indeed we sent Our Messengers with the clear signs, and We sent down with them the Book and the Balance so that men might uphold justice. And We sent down iron, wherein is great might, and many uses for men, and so that God might know who helps Him, and His Messengers, in the Unseen.
Surely God is All-Strong, All-Mighty." (57:25) This indicates that the aim of sending the Messengers with clear signs and sending the scriptures with them was that the people should uphold justice. If man were able to achieve justice through his intellect and without the need for revelation, there would have been no need for it.
The reason for man's being unable to define the standard for the judiciary is that there lie before him various worlds and higher and lower levels and degrees of existence. He moves from one world to another and from one level to another and he is immortal and imperishable. Since he moves from one abode to another, he must seek perfection through a power that does not cease or perish, and which does not harm his world or his Hereafter.
Obviously, determining such a power requires a comprehensive knowledge of the true nature of man and what makes him ascend to the highest stages or brings him down to the lowest levels. How does that knowledge compare with the little knowledge that has been given man, who does not have much understanding of what will benefit or harm him? The second point-the capacity of divine revelation in explaining the judicial system-is indicated by several Qur'anic verses.
"Whoso judges not according to what God has sent down-they are the unbelievers." (5:44) "Whoso judges not according to what God has sent down-they are the evildoers." (5:45) "Whosoever judges not according to what God has sent down-they are the ungodly." (5:47) The difference between unbelief (kufr) and the other contingent evils, as regards the judiciary, will be explained. Among them is the statement of God, the Exalted: "Is it the judgement of pagandom then that they are seeking?
Yet who is fairer in judgement than God, for a people having conviction?" (5:50) These verses suggest that judgement is either the judgement of Allah, determined by revelation, or the judgement of pagandom (jahiliyyah).