You can parse sentences in whatever way helps you to understand them - it is fine by me; indeed, I encourage understanding wherever it is not at the expense of the rights of another - if we can all understand each other, I think we can get along a lot better.
If you are in doubt about the meaning of a word, there is always recourse to a dictionary, Ms Malmros.
But just this one time I will take on the role of teacher and apprise you of the definition:
'Anterior - coming before in time'.
I hope that helps.
Well, that's news to me, but apparently it is indeed a secondary meaning of the term. I would have said "before", but as you like it. So. Do I think that you believe that you should show respect and humility before someone else should do so? Is that the question? If so, this sounds rather like saying "I'm not going to give in unless HE gives in first." That's not my personal view about how politeness or etiquette or reigi should work. YMMV.