I don't get upset over things I can control, because if I can control them
there's no sense in getting upset. And I don't get upset over things I
can't control, because if I can't control them there's no sense in getting
upset.
-- Mickey Rivers
Related:
There ain't no sense worrying about what you can control because
if you can control it, there ain't no sense worrying about it, and
there ain't no sense worrying about what you can't control, because
if you can't control it, there ain't no sense worrying about it....