Some people live their lives as pessimists, constantly expecting the worst so misfortune doesn’t sneak up and catch them unawares. The problem with this philosophy is that you can’t escape pain– everyone faces it at one time other another. But living in pessimism, while it may not exactly be painful, robs life of joy and replaces it with negativity. It pervades.
Pessimism is also the easy way out. It seeks to avoid or minimize pain instead of dealing with it. Optimism, while a more enjoyable state in which to live, is harder, because bad things do happen.
The key to optimism is resiliency. You have to be brave and strong, accept that bad things will happen to you, but believe that you have the power to overcome your pain.