> It really is wild the degree to which you can simply dictate your own mood.

This is not a universally true experience, and it's sometimes even hard for me to believe that there are people like you out there who are able to change their mood just by thinking differently. My own experience is that doing that is about as helpful as thinking differently about how hungry I am works to sate my hunger. I can ignore it to some extent, but it doesn't change in kind.