Spelling out this:

Paul’s argument in Romans runs from 1.16 through 11.36:

For I am not ashamed of the gospel, for it is the power of God for salvation to everyone who believes, to the Jew first and also to the Greek. For in it the righteousness of God is revealed from faith for faith, as it is written, “The righteous shall live by faith.” For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men, who by their unrighteousness suppress the truth…

For just as you were at one time disobedient to God but now have received mercy because of their disobedience, so they too have now been disobedient in order that by the mercy shown to you they also may now receive mercy. For God has consigned all to disobedience, that he may have mercy on all.

Oh, the depth of the riches and wisdom and knowledge of God! How unsearchable are his judgments and how inscrutable his ways!

“For who has known the mind of the Lord,
or who has been his counselor?”
“Or who has given a gift to him
that he might be repaid?”

For from him and through him and to him are all things. To him be glory forever. Amen.

(As I was writing with this I realized that the ellipses shows us Paul’s answer to the problem of evil, but I digress)

The two quotations that begin and end Paul’s argument come from Habakkuk and then Job smudged with Isaiah.

In other words, Paul’s argument begins and ends with theodicy. Thus, Habakkuk in some context:

Are you not from everlasting,
O Lord my God, my Holy One?
We shall not die.
O Lord, you have ordained them as a judgment,
and you, O Rock, have established them for reproof.
You who are of purer eyes than to see evil
and cannot look at wrong,
why do you idly look at traitors
and remain silent when the wicked swallows up
the man more righteous than he?
You make mankind like the fish of the sea,
like crawling things that have no ruler.
He brings all of them up with a hook;
he drags them out with his net;
he gathers them in his dragnet;
so he rejoices and is glad.
Therefore he sacrifices to his net
and makes offerings to his dragnet;
for by them he lives in luxury,
and his food is rich.
Is he then to keep on emptying his net
and mercilessly killing nations forever?

I will take my stand at my watchpost
and station myself on the tower,
and look out to see what he will say to me,
and what I will answer concerning my complaint.

And the Lord answered me:

“Write the vision;
make it plain on tablets,
so he may run who reads it.
For still the vision awaits its appointed time;
it hastens to the end—it will not lie.
If it seems slow, wait for it;
it will surely come; it will not delay.

“Behold, his soul is puffed up; it is not upright within him,
but the righteous shall live by his faith.