In other words, what you are living now is the result of what you’ve focused on in the past. Your future will be the result of the things you focus on today. Was your focus misplaced? Are there many things in your life you don’t want?
There are people who just won’t like you no matter what you do. You do not have to be an asshole in return.
You can change a crappy mood with the right song. Likewise, you can ruin a totally good mood with the wrong song.