Uncertainty

As imperfect beings living in an imperfect world, all of us face uncertainty. The degree of uncertainty faced by individuals has a large variation in magnitude. But no one escapes the Heisenberg rule. Some of us do our best to attain a state where the uncertainty in life is minimized, but it's never diminutive enough to be neglected. What this essentially means that
there are things which happen to us through our lives which we cannot hope to control. And there are even more such events which we can never never anticipate. The unknown component. Things you cannot predict.

All this implies that there are parts of our lives which we cannot control as hard as we may try to. That there are parts of us which are governed, albeit to a minimal extent, by the acts of other individuals or the nature of circumstances. To some, this uncertainty is acceptable, and there are still others who cannot stand it. These are the souls who cannot come to terms with the fact that there are some things which are beyond the control of the majestic beings that humans are. It's simply too hard and degrading for humans to learn that things are beyond control. Is their anxiety justified? Or are these people just too irked by the insignificant?

The larger question that emerges from this seemingly vague conception is: How do humans deal with uncertainty? Is it ok to worry about the future? To try and predict the outcomes of events which depend on factors other than individual endeavour?
This is a question that I think I must answer as I learn while I move through life. Is uncertainty something to be left unto itself or is it something worth processing in the human brain?