and all the firstborn in the land of Egypt shall die, from the firstborn of Pharaoh who sits on his throne, even to the firstborn of the maidservant that is behind the mill, as well as all the firstborn of beasts.
Just as you do not know the path of the wind, or how the bones grow to fullness in the womb of a woman with child; so you do not know the work of God who makes everything.