Everything is a Witness to the Power of Allah

Allah tells us about the signs He created that are indicative of His complete power and great might. He made the rays that come forth from the bright sun as the source of light, and made the beams that come forth from the moon as light. He made them of two different natures so they would not be confused with one another. Allah made the dominion of the sun in the daytime and the moon in the night. He ordained phases for the moon, where it starts small then its light increases until it completes a full moon. Then it begins to decrease until it returns to its first phase at the conclusion of the month. Allah said:

وَالْقَمَرَ قَدَّرْنَـهُ مَنَازِلَ حَتَّى عَادَ كَالعُرجُونِ الْقَدِيمِ - لاَ الشَّمْسُ يَنبَغِى لَهَآ أَن تدْرِكَ القَمَرَ وَلاَ الَّيْلُ سَابِقُ النَّهَارِ وَكُلٌّ فِى فَلَكٍ يَسْبَحُونَ

Commentary

These two verses mention some signs openly visible in the universe of our experience. They are evidences of the perfect power and eloquent wisdom of the most exalted Allah. They prove that the Lord Almighty is fully capable of bringing about the end of this universe, reducing it to particles, then reassembling the particles and bringing everything back to life, all anew, making everyone account for one's deeds and get punishment or reward as enforced. And when He does that, it will be nothing but reasonable and wise. Thus, these two verses are an extension of what was said briefly in verse 3. Mentioned there was the creation of the heavens and the earth in six days, the positioning on the Throne and the management of matters. The later proved that He did not, after having created the universe, abandon it to survive on its own, instead, He manages, directs and controls everything, all the time, every moment.