Many people often say yes to something when they'd rather say no. They offer cooperation through words but follow up with how they really feel in actions that contradict their words. That's passive-aggression. At its heart, passive-aggression is about being untrue to oneself, which makes it impossible to have a clean relationship with others. Passive-aggression as a communication method doesn't make someone bad. It is simply a strategy learned in childhood as a coping mechanism, a hard-to-break habit. Changing passive-aggressive behavior requires knowledge, tools, and practice, as outlined here.