Don't take it personally

I'm currently reading 'The Four Agreements' and one of the agreements is "Don't take anything personally"

Easier said than done.. I take *everything* personally! The objective is to understand that everyone lives in their own lives. They all are sitting there with a 360 degree mirror and do what they do for themselves. Often, when someone does something for someone else, it's to get rewarded by praise, or for some other reward. The point is, you can't change others thoughts, words, reactions. You can only control your own. So, when someone says something negative, don't take it personally. You can't know their motives, so don't try!