The plants, animals, seas, mountains, and people we see when we look around, and everything else in the micro universe – living or non-living – which we cannot see, are all obvious evidence of a superior wisdom which has brought them into being. Similarly, the equilibrium, order, and perfect creation present in the entire universe also prove the existence of a supreme possessor of knowledge who has brought them into being perfectly. The possessor of this wisdom and knowledge is Allah. 

We realize the existence of Allah from the perfect systems He created and the awesome qualities of living or non-living entities. This perfection is highlighted in the Quran: 

He created the seven heavens one above the other. You will not find any flaw in the creation of the All-Merciful. Look again–do you see any gaps? Then look again and again. Your eyes will become dazzled and exhausted! (Surat al-Mulk: 3-4)