Negative thinking is escapable, and many pessimists can in fact become optimists via cognitive skills
Healthy, Happier, Hopeful
A positive outlook in life helps fight depression and equips you with the necessary skills to fight setbacks and tragedies, if or when they happen.
Negative thinking causes frustration, anger, discouragement, feelings of helplessness and hopelessness, fear, anxiety and low self-esteem which can and (if felt for a prolonged period of time) will likely lead to depression. When individuals fall into depression, it reinforces pessimism which can causing the depression to worsen. This can create a dangerous cycle.
Health is better in optimists. They age gracefully and have less ills in middle age. Shockingly, pessimism may make people more susceptible to die of heart disease and individuals are more likely to get cancer. Optimists also have a stronger immune system, fewer infectious illnesses, lower cardiac risk and generally live longer than pessimists.
Optimists do better at college, school at work and in the playing field.
Pessimism is a choice and a learned response to life's disappointments and problems. In depression, it becomes a habitual way of looking at life. However, it is an unnecessary reaction. There is a better option (optimism), which mitigates depression and provides hope in the midst of even the worst of circumstances, making a way for positive change.