Disagree!
The change that I suggest covers everything!
The second they opened the box their view of "the father" started to change, and by the time they had finished looking at the contents it had been radically changed. One could even talk about a "u turn" change.
So, "up until they found the box", they had a particular view, but after they found it, and studied the contents, their view was changed forever.
That dramatic revelation is enhanced by the lyrics that I suggest, but not by the original lyrics!