Do you believe?

Sometimes, I come across a quote or passage that strikes a chord deep within me and gives me one of those A-Ha! moments.

This is one of them:

Happiness is not in our circumstances, but in ourselves.
It is not something that we see, like a rainbow
Or feel, like the heat of a fire.
Happiness is something we are.

~ John B. Sheerin ~

Do you believe this?