Qala rabbuna allathee aAAta kulla shay-in khalqahu thumma hada (surah TaHa: 50)

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(20:50) Moses replied, "Our Lord is He *22 - Who has given a distinctive form to everything and then guided it aright. " *23

Qaala Rabbunal lazeee a`taa kulla shai`in khalqahoo summa hadaa

*22) That is, "We acknowledge Him alone as our Lord in every sense: He is our Sustainer, our Maker, our Master, our Sovereign and is Supreme in everything, and there is no other lord in any sense but He."
*23) This concise sentence needs serious attention. It means that it is Allah alone Who has created everything and given it its distinctive structure, form, capabilities, characteristics, etc.
(1) For instance, tnan has been given the hands and feet which are given the most appropriate structure that was needed for their right functioning.
(2) A human being, an animal, a plant, mineral and the like, air, water and light-everything has been given that particular form which was needed for its right functioning in the universe.
(3) Then He has guided everything aright to function properly. It is He Who has taught everything the way to fulfil that object for which it has been created. He has taught the ear to hear and the eye to see; the fish to swim and the swallow to fly; the earth to grow vegetation and the tree to blossom and bear fruit. In short, He is not only the Creator of everything but also its Guide and Teacher.
Prophet Moses employed this concise and meaningful sentence to convey the Message to Pharaoh and his people. He not only gave a suitable reply to Pharaoh as to who his Lord was, but also told him why He was his Lord, and how there was no other lord than He. The argument implied in it was this: As Pharaoh and every one of his subjects was obliged to Allah for his human form and could trot live even for a moment without the functioning of the different parts of his body which were performing their functions in accordance with the guidance of Allah, so Pharaoh's claim that he was the lord of the people was absurd, and its acknowledgment by his people that he was their Lord, a folly.
Besides this, Prophet Moses also hinted at the need of Prophethood which was denied by Pharaoh. When Allah guides everything in the universe, He has also to fulfil the need of the guidance of mankind. Whereas the guidance of. the animals and birds has been provided by instinct, the guidance of rational human beings has been provided by sending Messengers who appealed to them by rational arguments.