Ecclesiastes 1:7; Ecclesiastes 11:5

Ecclesiastes 1:7

7 All the rivers run into the sea; yet the sea is not full; unto the place from whence the rivers come, thither they return again.

Ecclesiastes 11:5

5 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.