How to understand the existence of God

Plants, animals, oceans, mountains, and people around us, and all microorganisms are invisible - living or dead, is clear evidence of a superior wisdom that created it. Similarly, equilibrium, order and perfect creation that looks at the entire universe. All prove the existence of great knowledge owners, who created it perfectly. The owner of this wisdom and knowledge is God.
Perfect systems are created as well as admirable qualities in every creature, living or dead, raises awareness of the existence of God. Perfection is written in the Qur'an:

He created seven heavens in layers. You will not find a little any defect of His creation. Notice the many times - do you see the lack of him? Then, consider once again. Your eyes will be dazzled and exhausted! (Surat al-Mulk: 3-4)