Hope is the spark that can keep the engine of life running. It brings a lot of success to life. There is nothing more killing than losing hope in your life. If you want to be successful in your life or even wish to live a decent life with your share of happiness, you need to have the spark of hope. Pessimistic people with hugely negative takes on life are generally those that live a life with no hope whatsoever. It is this reason that they suffer a lot and you can hardly see them happy.