Worry is a misuse of the imagination, because you can not change things beyond your control and worrying about something will not change the outcome. When you worry your imagination works overtime, considering the worst possible scenarios when this may not actually happen. You could be using your imagination to imagine a better life and a brighter future instead of wasting all of this energy and your precious mental resources on worry. God has a plan and you can not control or change what will happen, you can only hope for the best and try to avoid worrying about the worst. If something bad happens then you will have to deal with this when the time comes. Worrying about it before it happens will not serve any useful purpose and will be a waste of your time, energy, and imagination. Life can be hard enough without any unnecessary problems, and worrying about what could happen is just piling on more negative energy when this is not needed.