Re: Living too long
Respectfully, I have to disagree that depression is a mindset. It is caused by he pathophysiology (caused by inflammation, the morphology of the brain [genetic], trauma, toxins, disease) distributed across many brain regions and circuits.
Being sad or down for a while when you have a healthy brain is not the same, and it is not depression. If you are down and have a healthy brain, you have the basic functioning equipment to use strategies to get well. Examples of this are healthy people who lose a loved one, face a job loss, go through a divorce, etc causing them to remain sad, lonely, distant, and otherwise dysfunctional for a while. They have the equipment to get better - and there are many strategies that can work for them.
Depressed people can no more pull themselves up by their bootstraps to control their illness any more than people can do likewise to cure their cancer. This is why no one who is physiologically depressed ever graduates out of therapy without medical intervention - or their bodies heal as a result of immune responses. They aren't weak or negative, their brains are sick and require medical treatment.