You can only control just three things in life:
1) Your thoughts...
... and whether you think on those things that are true, honorable and right... or not (Phil.4:8).
2) Your imagination...
... and whether you use your imagination for good or evil (Gen.6:5).
3) And your actions...
... and whether or not you choose to obey God's Word (Jn.14:23).
Once we figure this out -- and by God's grace live faithfully in these three areas -- life gets simpler...
... as we leave many of the details we worry about to God.
And, we land in the best position possible to advance His kingdom.