If everyone has the capacity for some measure of depression under some circumstances, everyone also has the capacity to fight depression to some degree under some circumstances. Often, the fight takes the form of seeking out the treatments that will be most effective in the battle. It involves finding help while you are still strong enough to do so. It involves making the most of the life you have between your most severe episodes. Some horrendously symptom-ridden people are able to achieve real success in life; and some people are utterly destroyed by the mildest forms of the illness.