We gradually reduce the land from its outlying borders

What does the Al-mighty’s saying mean: {See they not that We gradually reduce the land from its outlying borders? (Where) Allah commands there is none to put back His command: and He is swift in calling to account.}[1], and His Al-mighty’s saying: {..see they not that we gradually reduce the land (in their control) from its outlying borders? Is it then they who will win?}

Arc Of Ascension and Arc Of Descension

What are the three darkness’s in the words of Allah:
“He created you from one being, then from that (being) He made its mate; and He hath provided for Resurrection you of cattle eight kinds. He created you in the wombs of your mothers, creation after creation, in a threefold darkness. Such is Allah, your Lord. His is the Sovereignty. There is no God save Him. How then are ye turned away?”