Limited Growth

Why does it so happen that the bodies of men do not grow beyond a certain limit despite the fact they continue living and to feed? What is this due to if not to Deep Percipience?
The Almighty Allah has so ordained that each species of living beings should have a definite limit of growth – no bigger nor smaller. They continue to increase up to that limit and then stop growing, even though feeding continues without. If it were not so ordained they would have continued to grow till their bodies would have grown out of recognisable limits. ¹

References:

1. Tradition of mufaddal, dictated by Imam Ja’far al-Sadiq to Mufaddal (Mufadhal) ibn `Umar[↩]

[Quran Chapter 30:5-6] 5. In Allah's support. He supports whomever He wills. He is the Almighty, the Merciful. 6. The promise of Allah—Allah never breaks His promise, but most people do not know.