In fact, the real optimism is the pessimism. You turn out right when it turns out worse or you turn out happy when it turns out better.
Comedy and tragedy are the opiums with different effects. Comedy is utilized to make people forget while tragedy is used to have them be reminded. Both can be utilized as a means for the political power. However, tragedy circulates and wraps the life just too much that it is hard to imagine the comedy of a war compared to the tragedy of a new-born child. Thus, we have the phenomenon called trauma in psychology. Many neural entities, such as humans, absorbs the tragedy like a sponge. On the other hand, if you'd ever asked a person what's their happiest moment in different times, the answers you'd get would be quite inconsistent and somehow late.