I've got the joy, joy, joy, joy down in my heart... yes, down in my heart, yes... down in my heart (Sound familiar?)

For the past year or so, I’ve been grappling with the issue of what role joy is supposed to play in my life. Not only for me, but for all of you. I’m not like Susie-Crackhead. Sometimes I’m not happy-go-lucky. For the most part though, I feel blessed by what God’s given me. I can find something to smile/laugh about, and feel an inner happiness. The hope that comes from my relationship with Christ really does sustain.
With that in mind, I’m shocked at how many people I meet that just seem totally miserable. If they have that same hope and relationship, why are they lacking the joy part? Whether it’s the bitter girl who feels that life is unfair, or the dude at work that just never has anything positive to say.
Whenever my roommate and I would feel sorry for ourselves, we had a tradition. Calley would insist that she and I tick off a list of five positive things we’ve got going on. Surprisingly, it was quite an effective pick-me-up.
If Christians don’t feel and exhibit joy, it seems like a rather dismal living testament. Do you think it’s wrong not to seek out joy? Why do you think so many people just don’t have it? Off the top of my head, I can’t think of any applicable scripture. Please feel free to share if you have a verse or two.