Who is "us", Lutherans, in particular, or Protestansts as a whole?
The “us” is all who are searching for God’s truth, unfiltered by uninspired men. Luther rightly argued that we ought to go directly to the Scriptures.
It might be hard to believe, but even though Bibles abound, there are many even today who teach things not found in it. The simple and friendly challenge we ought to make frequently to one another - and to ourselves - is: Where is that found in the Scriptures?