When trapped within a religious maze, it gets confusing when the focus becomes about you and your dedication to God through your works and actions. Those from the "holy hierarchy" will be spouting grace and God's love one minute but in the next breath, they'll tell you to behave in a certain way to ensure you're right with God, justified, sanctified ... while on the journey to making faith perfect.
The way of the old unprofitable and expired covenant for the Jews before the cross was centered around their pursuit of righteousness and salvation based upon not just hearing the word (of law) – but actually doing it. As the Apostle Paul stated in his Romans letter, there never was nor has there ever been a successful doer in the works department. So where do we go from here? That's where the gospel comes in.
There was a significant lack of knowledge in the early years of the church. The cross and resurrection changed everything, resulting in the elimination of a covenant that had been in place for centuries. Consider if a Jewish person who believed in Jesus after the cross ... but still also believed the law of Moses was still to be applied for all Jewish people ... just exactly what did that mean for them? How did the blood of Jesus fit into that compared with the continued attempts to be doers of that old word? And what did it mean for Gentiles who never had the law?
When encouraging them to work at fulfilling that law, faith alone would be considered insufficient for salvation and justification. Righteousness would continue to be pursued by works plus faith. It formed a mindset that people such as Abraham and Rahab were not justified by believing, but by works being added in order to make faith perfect. How is this much different from the legalistic mumbo jumbo many of us have heard in works-based churches for so long? Let's take a closer look at the Rahab factor in the context of being justified.