5 As you do not know the path of the wind, or how the body is formeda in a mother’s womb, so you cannot understand the work of God, the Maker of all things.

Read Ecclesiastes 11:5 Using Other Translations

As thou knowest not what is the way of the spirit, nor how the bones do grow in the womb of her that is with child: even so thou knowest not the works of God who maketh all.
As you do not know the way the spirit comes to the bones in the womb of a woman with child, so you do not know the work of God who makes everything.
Just as you cannot understand the path of the wind or the mystery of a tiny baby growing in its mother’s womb, so you cannot understand the activity of God, who does all things.