We’ve all known people who are depressed at one time or another. A lot of us have people in our lives that seem to fall prey to depression more frequently than what seems “normal.” Sometimes they’re mood doesn’t even seem related to any incidents going on in their lives. Often they seem to be living a full life and it can be hard for other people to understand why they’re down. People say, “Cheer up” not knowing that a depressed person cannot simply snap out of it. A lot of us have personally dealt with bouts of depression. Us creative types seem especially prone to the high highs and low lows. Here’s a very interesting article about theories on the causes of depression titled, “Could Depression Be Triggered by a Gene?” .