All of Gen. 16 is one narrative unit which I have titled "A Tale of Weak Faith."
In vv. 1-6 we learn that 1) Attempting to Help God can lead to complications.
Then, in vv. 7-15 we learn that 2) God is merciful in spite of our Sin.
We see that a) In spite of sin, life goes on and God still works with us and desires our obedience (vv. 7-8).
And b) Do the right thing (v. 9).
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