Thereof We created you, and into it we shall return you, and from it We shall bring you out once again.
meaning, `the earth is your beginning. For your father, Adam, was created with dirt from the surface of the earth. You also will be returned to the earth. This means that you will become dirt when you die and decay.'
The statement, "And from it We shall bring you out once again," means,
يَوْمَ يَدْعُوكُمْ فَتَسْتَجِيبُونَ بِحَمْدِهِ وَتَظُنُّونَ إِن لَّبِثْتُمْ إِلاَّ قَلِيلً
On the Day when He will call you, and you will answer with His praise and obedience, and you will think that you have stayed (in this world) but a little while! (17:52)
This Ayah is similar to Allah's statement,
قَالَ فِيهَا تَحْيَوْنَ وَفِيهَا تَمُوتُونَ وَمِنْهَا تُخْرَجُونَ
He said: "Therein you shall live, and therein you shall die, and from it you shall be brought out." (7:25)
Musa showed Fir`awn all of the Signs but He did not believe
Concerning Allah's statement,
وَلَقَدْ أَرَيْنَاهُ ايَاتِنَا كُلَّهَا فَكَذَّبَ وَأَبَى