Low days exist to remind you that you still have choices. 

High days, John, exist to remind you of how fast you rebound... among other things.

Boing, 

   The Universe

"This app makes my day continually." * "This is the best app ever." * "Love this app... just when I needed an emotional pick-me-up."

High days, John, also remind you that no matter where you've been, I can still reach you.