Master Hui-neng condensed all he knew into four verses of which the most crucial is “fundamentally nothing is ever there.” Phenomena have no inherent existence, are neither arising nor ceasing, neither coming nor going. Through anger that is seemingly arising and ceasing on the surface, there is a chance to enter the non-arising, non-ceasing Buddha nature (dharmadhātu), thus meeting dharmakaya. Anger at this point does not produce evil karma; instead, it facilitates the practice. But the premise is having attained realization beforehand and the requisite for attaining realization is to have generated renunciation and bodhicitta. Those who have yet satisfied these requisites should then use practices of the relative truth to stop anger.

~ Depicted from "THE HANDBOOK FOR LIFE"S JOURNEY : On The Three Poisons - How to Confront Anger