I think it was Zig Ziglar who said, "You don't know enough to be a pessimist."
Zig meant that something that goes terribly wrong today can actually be the very thing that brings about something fantastic tomorrow.
When we triumph over something or we experience a disaster, our ego tells us that the triumph is the BEST THING POSSIBLE and that a disaster is the WORST THING EVER.
Yet, in time not only do we realize benefits from our disasters but we also often experience problems and irritations from our triumphs. Consider the people who struggle so hard to become famous but then can't leave their homes without being mobbed!
There's an old saying, "nothing is ever as good or as bad as it appears."
If that's true, and if you don't know enough to be a pessimist, why not just relax and watch the twin imposters of disaster and triumph pass through your life with ease?