أَوَلَمْ يَرَ‌وْا إِلَى الطَّيْرِ‌ فَوْقَهُمْ صَافَّاتٍ وَيَقْبِضْنَ ۚ مَا يُمْسِكُهُنَّ إِلَّا الرَّ‌حْمَـٰنُ ۚ إِنَّهُ بِكُلِّ شَيْءٍ بَصِيرٌ‌ (Have they not looked to the birds above them spreading their wings, and (at times) they fold (them) in? No one holds them up except the Rahman (the All-Merciful). Surely He is watchful of every thing...67:19)

This verse invites attention to the fact that the birds have weight, and in terms of the law of gravity, weighty bodies should fall down on the earth, if they are released from above. Normally, it is not possible for the air to hold them up. But Allah, through His consummate power, has created these birds in such a way that they can hold themselves up in the air. Apparently, they have no intellect, but Allah has taught them the art to make the air carry their burden and to fly in it by maneuvering their wings in such a way that at times they outspread them and at other times they fold them back. In this way they subjugate the air to their benefit. It is obvious that enabling air to hold them up, designing the wings of the birds on this particular shape and teaching them the art of controlling the air, all these functions were possible only by Allah's Supreme Creative Power.

Thus far the conditions of various categories and species of existent beings were analysed and considered in order to provide evidence of Divine existence, His Oneness, His unique knowledge and power. If a fair-minded person were to consider them carefully, he will have no choice but to believe in Allah. From the next verse up to the end of the Surah, the non-believers and the unrighteous people of all categories are warned of the Divine scourge. First, they are admonished that if Allah decides to punish any nation, there is no power in the world that can stop Him. There is no fighting force or army of soldiers that can come to the support of the disbelievers and save them. Thus the next verse says: