His creating them on nature would be ineffective...
His creating them on nature would be ineffective, for it is not satisfied with any perfection except by reaching the Beginning of the perfection that does not have any limit. Therefore, Godly wisdom requires that the human life should not be a materialistic and animalistic one. Rather, human beings should accomplish and reach the goal for which they were given intellectual and spiritual powers. What! Did you then think that We had created you in vain and that you shall not be returned to Us?
[^5] Third Proof Indeed, human nature ordains that every deserving person should be given what he deserves and that every oppressed must seize the oppressor. Despite the difference in their faiths, thinking and what they worshipped, nature drove human beings in all eras to form justice systems and courts for the implementation of justice.
We see that many oppressors and criminals die without punishment and we see the oppressed dying under the scourge of the oppressors and the conflagration of their suppression. Thus, the Wisdom of Allah, the Exalted, His Justice, Might and Mercy demand that there be another life where the oppressors take what they deserve from the oppressors. And do not think Allah to be heedless of what the unjust do; He only respites them to a day on which the eyes shall be fixedly open.
[^6] Fourth Proof The Wisdom of Allah, the Exalted, facilitates a means for human beings to accomplish the objective of their existence and the aim of their creation, and this cannot occur without the command of Allah to do that which necessitates privilege and to stop them from that which results in adversity. Implementation of divine dos and don’ts against human desires is not possible without the presence of two factors: fear and hope.
These two are not achieved except by the giving of glad tidings and warning. Giving of glad tidings and warning necessitate the existence of reward and punishment, and Paradise and Hell after this world. Otherwise, the giving of glad tidings and warning would be false. Allah, the Exalted, is higher than lying and evil. Textual Proofs The divine religions all agree on the existence of the Return and the life Hereafter.
All Prophets (as) have informed about the Return, and the followers of the Divine religions have given credence to them. The infallibility and protection of the revelation from mistake requires the belief in the Return.