Equanimity appears in all of the essential categories pointing us in the direction of full awakening. It is the fourth Brahma-vihāra, the last of the seven factors of awakening, and the last of the Ten Perfections. Without the stability and maturity of a still, non-reactive, and stable mind, we cannot make progress in dissolving unskillful mental habits and freeing the mind.
Equanimity is both a dynamic and highly-skilled practice as well as an outcome. When we practice equanimity, we remember that incessant change is inherent in all phenomena. We recall the insight that reacting with resistance or craving only makes things more problematic. We simultaneously commit to remaining calm and accepting in the midst of any conflict, loss, physical pain, or emotional distress. We know shouldering the stress of the present moment will diminish future suffering. In essence, equanimity is the long game approach to happiness.