Have they not observed the birds how they are made subservient disposed to be able to fly in the air of heaven? that is in the air between the heaven and the earth. Nothing holds them when they draw in their wings or open them lest they fall except God by His power. Indeed in that there are signs for a people who believe the signs which are that they have been created in a way that enables them to fly as well as the creation of the air in such a way that it allows for flight and the holding of them up in the air so that they do not fall.