Scripture uses pronouns such as "we", "us", "our". Getting this wrong spells the universe of difference and can slide you down to errors of mega proportion.
1. Type I error: When Scripture uses "we/us/our" to refer to human beings collectively, but one interprets it as a reference to believers. With this error, no one could ever be a believer and the Scripture can never be availed of for comfort.
2. Type II error: When Scripture uses "we/us/our" to refer to believers, but one interprets it as a reference to human beings collectively. With this error, everyone is a believer and whatever Scripture says, nothing matters, since every one is a child of God hence, comforts the one in their sins.
In my study, Old Lutheran JBFA (repeat I mean BoC JBFA teaching), gets the above correctly and delineates between the two ways Scripture uses the above pronouns. I may be called biased but honestly, the BoC is a respectable document. I would prefer to read it second to the Scripture and I even prefer to read it rather than the works of Synodical Fathers. One should stop circling the wagons.