You can not change the reality of '3', though you can change its name.

You can not change the reality of '3', though you can change its name. There exists such a deep and existential order between all creatures of the universe. If you take anything out of its existential place, it will loose its substance and will no longer be the same thing. If you give a triangle four vertices instead of three, it is not a triangle any more. In fact it is a square. Ibn Sina has a nice sentence here.

He said: "God did not make apricots into apricots, but He created apricots." What he means is that there was no stage when all fruits were equal and then God discriminated between them. Each fruit is unique. This uniqueness applies to different beings and personalities as well. Allah said in Quran: "... Our Lord is He who gave every thing its nature, then guided it aright." (Quran 20:50). In another place He said: "Our word for something that we intend, is that to say to it: Be!

and it will be." (Quran 16:40). Now let us go over the transversal order. The transversal order determines the temporal and material conditions of different phenomena. It is with this order that history takes definite and certain form.

Allah refers to this order of existence in this way: "..., and you shall not find any change in the custom of Allah." (Quran 33:62) Some of these deterministic laws are mentioned in Quran like the following: "Allah does not change the situation of any group of people, unless they change what is in themselves." (Quran 13:11). Now to sum up this section: The universe has orders and necessary laws, and every phenomenon is within that system.

For the universe to be in order, there should be differences and stages in existence. Differences are necessary attributes of creatures, and God has made no discrimination between the creatures. What is against the justice is discrimination and NOT difference. In the universe, there are differences among the creatures and not discriminations by Allah. Now that we have understood this section, we can answer the previous question by looking at the benefits of suffering for individuals.

BENEFITS OF SUFFERING It is only through suffering and difficulties that one can attain true happiness and true prosperity. Allah says: "Verily there is ease with hardship. There is ease with hardship. So when you are relieved, still toil, and strive to please your Lord." (Quran 94:5-8). Hegel says: Disputes and evil ('suffering' to be precise) are not imaginary.