I Must Feel Pain
I need to be excited and happy so therefore, I must feel pain. You see, the opposite of happiness isn't hate or pain; it's indifference. It's stopping and not feeling anything, that is indifference.
Your happiness will bring pain one day and your hardest days will bring you a contrast to your best moments. When you feel pain, I want you to be slightly hopeful and happy. Why?
Because you're alive.