What is clearly noted is you start in Romans 4 when it was part of the larger discouse started in Chapter 2.
Actually, I start at the transition from one subject to another subject in Romans 3:24. The subject of God's wrath, judgment and condemnation of sin has been the theme from Romans 1:18 to Romans 3;23. In Romans 3:24 he introduces another subject - Justification of sinners. So, I properly differ between the subjects and deal with the subject of Justification in its proper place and context in Romans which is Romans 3:24-5:21.
Thus you play on peoples ignorance of the scripture because they don't realize chapter numbers and verses were not originally written into the text but a later development thus contextually his discourse about the primacy of faith started before chapter 4. Which then causes me to question your Hermeneutics.
You need to look at the context more carefully. The subject introduced in Romans 3:24 is justification not the primacy of faith. Faith is only introduced as a means in receiving justification as opposed to works. However, justification is the primary subject throughout.
Also you failed to deal with the natural contextual divisions in Romans 4 which deals with the topic of justification in connection with Abraham. Again,
1. Statement made - Romans 4:1-3 - justification by faith versus works
2. Statement supported by principles - Romans 4:4-5
3. Statement supported by example - Romans 4:6-8
4. Statement confirmed by application to Abraham and seed - Rom. 4:9-12
1. Statement made - Romans 4:13 - Promise obtained by grace versus Law
2. Statement supported by principles - Romans 4:14-17
3. Statement supported by example - Romans 4:18-20
4. Statement confirmed by application to Abraham and seed - Rom. 4:21-25
Conclusion drawn - Romans 5:1-2
The second grouping and second argument concernng how the "promise" was obtained by grace and the principles that define grace repudiate obtaining the promise by law keeping or by any kind of personal contribution but rather by the power of God to keep His promises.
Furthermore, the reference to Genesis 22 is not by contextual design to prove that "justification" is progressive, linear and uncompleted in action but rather to prove that God's promises of grace are kept by God's power and that the nature of justifying faith merely receives and rests in those promises - Rom. 4:21 - rather than participates actively in contributing to or obtaining those promises. This explanation completely defies the whole Roman Catholic system of salvation.