Running on Fumes

So here's the scorecard for my health for the past week:

• Seven days ago (Thursday): Woke up feeling 'meh.' Sick day.
• Six days ago (Friday): Feeling better, but needed a nap before the symphony.
• Five days ago (Saturday): Hey! I feel great! I think I'll do...something, the exact nature of which I cannot remember now but at the time I had plenty of energy for.
• Four days ago (Sunday): Oh. My. Gosh. I am dying, and I believe this may be the end of my life so I'm glad it's Sunday and after I play at two church services I can die peacefully in my sleep.
• Three days ago (Monday): I'm still alive, but I'm only going in to work for that meeting with my boss and then it's back to bed. 
• Two days ago (Tuesday): Hey! I feel great! I'm Alive! I'm Well! My headache is gone and I have a spring in my step!
• Yesterday (Wednesday): I think I'm having a relapse. I have a headache, and I am so tiiiiiiired that I just want to lay my head down on my desk and nap, but oddly, the other symptoms of my Great Illness are gone. 

Today when I pulled the coffee pod out of the coffeemaker I realized that I had inadvertently brewed yesterday's morning pick-me-up with the non-pick-me-up variety. I switched back to the customary morning pods today, and six hours into the day I'm feeling great.

My body is like a finely tuned machine, and this machine apparently is fueled by caffeine.