وَإِن مِّن شَيْءٍ إِلَّا عِندَنَا خَزَائِنُهُ وَمَا نُنَزِّلُهُ إِلَّا بِقَدَرٍ مَّعْلُومٍ (21)
(15:21) There is not a thing whose treasures are not with Us, and We send down each thing in appropriate measure. *14
*14) This is to bring home the fact that it is not vegetable life alone that has a fixed limit to its growth, etc: The same is true of everything that exists, whether it be air, water, light, heat, cold, mineral, vegetable. animal or power or energy, in short, each and every thing exists in the prescribed quantity, number, etc. , which neither decreases nor increases. It is this "determined course", in each and every thing, which has produced appropriate balance and proportion in the entire system of the universe to such a perfection that one is led to the inevitable conclusion that the whole thing has been designed by its All-Wise Creator. For, had the universe come into existence by mere accident or had it been created by many gods, it was impossible to have such a perfect balance and appropriate proportion with perpetual consistence in so many different things and powers.