Desire leads to frustration, which in turn leads to Anger. Thus, Anger can be a fulcrum by which the oppressed are eventually catapulted to freedom.
Desire creates an identification with -or attachment to- expectations. This creates suffering when the attainment of the expectation is not met. Desire, the , has to be checked by the beginner’s mind, the middle way. Anger can act as a catalyst for improvement, positive change, necessary growth.