Where, then, is boasting? It is excluded. On what principle? On that of observing the law? No, but on that of faith.
We all have some amount of self confidence and belief in our own abilities whether it is a little or a lot. Some people suffer from low self esteem while others are overflowing with confidence to the point of arrogance.
When it comes to faith, there is no room for boasting however. In regard to salvation, everyone’s faith is equal and accomplishes the same thing.
People are given different amounts of faith as some are given the gift of faith which means that they have extraordinary faith compared to others. This is not a reason to boast either though because everyone has been given gifts by God.
The Pharisees often boasted about their righteousness and considered themselves better than other “sinners” because they believed that they followed the law. In writing to the Romans, Paul wants to make sure that they don’t fall into the same trap with regard to their salvation.
It requires the same amount of faith for a person to be saved, regardless of their past sins. No person is “more saved” than another person. Because all are equal, there is no point in boasting about salvation.