There are many things over which you have no control which nevertheless can significantly influence your life. If they're out of your control anyway, should you just sit back and let them happen?
Yes and no. Let them happen, yes. Sit back, no. No matter how powerful the events beyond your control may be, no matter how powerless you may be to influence them, you can always control how you respond to them and what you make of them.
Even in the most seemingly hopeless of situations, hope is there. Because hope resides not in the circumstance, but in your heart. No one can take it from you unless you let them.
Do your absolute best with the things you can control, and you'll flourish in spite of the vagaries of the world around you. Be prepared to respond positively and effectively, no matter what circumstances come along. Though many things are beyond your control, what you do with them is completely up to you.
" Events are called inevitable only after they have occurred."
~ Mason Cooley