The verse says:
يا أَيُّهَا النَّاسُ إِنَّا خَلَقْناكُمْ مِنْ ذَكَرٍ وَ أُنْثى وَ جَعَلْناكُمْ شُعُوباً وَ قَبائِلَ لِتَعارَفُوا إِنَّ أَكْرَمَكُمْ عِنْدَ اللَّهِ أَتْقاكُمْ إِنَّ اللَّهَ عَليمٌ خَبير
"O mankind, indeed We have created you from male and female and made you peoples and tribes that you may know one another. Indeed, the most noble of you in the sight of Allah is the most righteous of you. Indeed, Allah is Knowing and Acquainted."(49:13)
I want to know interpretation of this verse. What is the exact interpretation for the word "لِتَعارَفُوا "?
Why is Allah considering "made you peoples and tribes" as a tool for knowing each others?
How could differences help us to know each others?