There’s an enormous difference between good complaining and bad complaining, and it’s important to know which is which. You’ve heard about the double-edged sword. Well, this is one of them. When we complain we have the power to be constructive or destructive.
When you're a Christian, gratitude counts for a lot. It's not an official fruit of the spirit, but it might as well be. There's something special about gratitude. It helps you to acknowledge all of the things you would normally take for granted. And that's important. But sometimes gratitude is in short supply and it can make you feel like a bad Christian. All someone has to do is bring up a real tragedy (like starving children) and then you're wishing you hadn't said anything in the first place.