Here is great help for a question -- no, THE question -- I am asked all the time. Read here. It's by Peter Kreeft. Need I say more?
Here is a taste of the article: "we often get bent out of human shape by our desire—in itself a very good desire—to find God's perfect will for us. We give a terrible testimony to non-Christians; we seem unable to relax, to stop and smell God's roses, to enjoy life as God gives it to us. We often seem fearful, fretful, terribly serious, humorless, and brittle." Ouch! Go read the whole thing!