King James Version
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.English Standard Version
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.New International Version
As you do not know the path of the wind, or how the body is formed in a mother's womb, so you cannot understand the work of God, the Maker of all things.