Happy now?

I agreed to submit an article to the special issue of a journal on happiness. My brief, very brief indeed: religion and happiness. Which I interpreted as some angle on religion-and-happiness, but even that's turning out to be difficult. What is happiness? What would make a person think there was such a thing, a single thing, unchanging and accessible in every time and place? (Don't get me started on "religion"!) But it's no fun simply to point that out, huh! Suggestions, anyone?