Facing something usually looks less impressive than it sounds. It's opening the letter on the day it arrives rather than leaving it propped behind the fruit bowl for a week, which is where most of the damage actually accumulates.
Confidence here isn't a feeling about the outcome. It's a working assumption that you'll still be able to do something on the other side of the bad news, whatever it turns out to be. That assumption has a good deal of evidence behind it, given how many previous bad envelopes you have already survived.
The positive part is smaller than it sounds too. Not cheerfulness about a loss. Just the next concrete action — one phone call, one list — taken before the mood has cleared.