United We Stand, Divided We Fall

God has created human beings with many varieties, there is a white there is a black, there is a short length there, there are blue eyes and some black. Even our language is also different. Why did not God just create us all the same? if God created us all together we do not know the meaning of difference, because with the difference we can know the advantages and disadvantages of each. So we are told united, for what.? so that we can share our advantages and cover our deficiencies with the advantages that others have.
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