If you are depressed, ipso facto, you have a chemical imbalance in your brain. Depression is the by-product of our human psychological defense system. Our defense system is activated by fearful or anxious thoughts, of which you may or may not be aware, that trigger the fight-or-flight response.
The chemical imbalance of depression is caused by the inadvertent triggering of the fight-or-flight response which dumps stress chemicals into our brain; chemicals like adrenaline, epinephrine, norepinephrine, etc. to biochemically prepare us for immediate action. If we take immediate physical
action, the stress chemical imbalance is righted and we return from the stress mode (sympathic mode) to the at rest mode (para-sympathetic mode).
QUESTION 2: What is the correct amount of chemicals you are striving for?
It is a matter of constantly taking the correct fork in the thinking road instant by instant as soon as depression hits. Avoid the subjective, choose the objective. (Not: Oh I'm feeling bad, but isn't that an interesting pattern of light on the wall. Avoid the emotional, choose the neutral or nonsense (Not: Oh I'm feeling bad but “Row, row, row your boat” or some othedumb nursery rhyme or song.) Avoid the downer thought and choose the upper. (Not: Oh what a dreary morning, but hey, at least the house isn't on fire, how great is that!) Avoid self-focus, choose outer-focus (Not: I'm feeling bad but send some healing prayer to another person.) Avoid disengagement, choose re-engagement (don't crawl under the covers, get out and take a walk, talk to the paperboy.)