Line 2 - To read these words proof is given that a scribe can reveal their meaning.

Here, the text again refers to itself in terms of the placement of the book.  
As I presented in the last section, the chapters refer to different aspects of the puzzle, or the key.  The first chapter (Terribilis) refers to what we are looking for and a little background on its history.  In this chapter, the book is leading us directly to the parts of the book itself.  The first line told us to go to the "fearful warning", before the pigpen text; and now this line refers to our action of having decoded the text itself.  

But what it has also shown us is the double meaning behind the word, "scribe".  We know that, in one sense, "to scribe" means to copy or write something down, such as in a document or tablet.  There is another meaning of scribe, of course, which often relates to marking a circle.   Could it be concluded that a circle might reveal the words' meaning?