The kinds of stone...
The kinds of stone, which are used in buildings, are taken from mountains, and there are cited some other advantages counted among the benefits of the mountains.
Then the Qur’an points to another bounty, which is also one of the signs of the greatness of Allah, when it says: “…and We set therein broad high ways that they may be guided.” Verily if these valleys and gaps were not, the great series of mountains existing on the crust of the earth, would so separate the different regions of the land that the joint of them was utterly broken, and this shows that all these phenomena have been arranged according to a proper program. Explanations…
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