I will think positively.
I am thinking positively.
I am positive that both knees are stiff, the left especially painful.
I am positive that my fingers have all swollen so I can't make fists.
I'm positive that my left shoulder is stiff and almost painful.
I'm positive that just putting my socks on feels like I'm running a marathon.
And I'm positive that most of this will clear up in a couple of days.