>I just think that our brains experience sadness for a reason: it's a signal that something is wrong in our life and that we need to change it. Forgive me, but

>I just think that our brains experience sadness for a reason: it's a signal that something is wrong in our life and that we need to change it. Forgive me, but I don't understand how someone can just decide to come up with alternate explanations of attentively studied medical conditions. While there's still a long way to go in understanding clinical depression, we know for sure that particular chemical imbalances in the brain, or the inability to process those chemicals, cause the most commonly recognized symptoms and behavior. This is like telling someone with diabetes, "I just think your pancreas is trying to tell you that your life is missing something."