~~~I've never thought of worry as a sin before. Worry is basically fear. Fear that things won't turn out like you want them to. And fear is the antithesis and lack of faith. And it makes sense that being without faith is sinful. (I'm using a broad, black-and-white term of the word sin here.)
Essentially, worrying is saying that you think God isn't in control. "Sure, He's all powerful, but I don't know if he can handle this one." You aren't demonstrating faith and truly giving it to God, after all you can do.
It's pride. You think that God can't do all He says He can, but you can make a difference by worrying about it. Like that has any affect whatsoever, besides giving you more lines in your forehead.Now there are times that worry might be a litle more justified. If, say, you've known about a presentation for months, but are searching for a projector two days before, you should be worried. (Just a hypothetical here.) You haven't adequately prepared, and you can't expect God to come in and drop a projector at your door when you haven't done your part. If, however, you've exhausted all options, and prayed, you've got to trust that God is in control. He knows and wants what's best for you, and wants to help you. But you've got to do all you can, then give it to God.
So what are you worried about? Husband finding a job? Keeping his job? Your teenager's friends? Getting pregnant? Getting cancer? Whatever it is, here's what you need to do: Do all you can. Everything in your power. Then pray, and trust that God is mindful of you. Remember that your needless worry shows that you doubt His power. Which is obviously silly, since He has all power.
What are your thoughts on worry as a "sin"?