I saw that in Article 1 after posting and I deleted the post (while you were typing your response) ... point acknowledged.
OK.
Accepting the Archaic meaning is the correct one, does a phrase that means either "must believe" or "can believe" with no indication which is the intended meaning not qualify as "wishy-washy". I say it means the Holy Ghost makes it so we MUST BELIEVE and you say the Holy Ghost "enables" us to believe and the text as written say we are both reading it correctly.
That's Political-speek ... "We believe in Jobs and the Future!" ... everyone gets to hear whatever they want to hear.
I understand what you are saying, and I can agree with you to a point. By using the word "shall" we are both seeing what we want to see in that text. However, with the benefit of hindsight and what we know about Arminianism, we now know that the implication of the word "shall" is that the Holy Ghost enables us. Your point was that the original authors intended it to be vague. This is difficult to know without further historical information. I will concede that it can be considered vague, but I can't necessarily go along with it being intentionally vague on the part of the author(s).