I shouldn't base my definition of happiness on other people's definitions, but how would I know whether I've found it, otherwise?
After all, it's so easy to get lost in the pursuit of immediate happiness. But it's not the same as real happiness, right?
Maybe, before I ask where my happiness is, I should ask what it is, first. Else I might pass it by without even knowing (have I done that, already? more than once?)