The problem I see in those depressed isn't that they are pessimistic fools. Instead its about focus and drive. When a problem arises, the optimist will say its not that bad and move on, the pessimist will say its the worst thing ever and never move on. However, both aren't dealing with any sort of issue. One just maintains la la land while the other thinks only on problems. Not just person to person, but as a civilization, we need to focus more on solutions rather than ignoring or hyperfocusing on problems.
The Lord bless you and keep you; the Lord make his face to shine upon you and be gracious to you; the Lord lift up his countenance upon you and give you peace.