Fire.

A man, driven by anger will do more then one driven by compassion or love or duty. One burned by injustice ignites to cause change. It provides the drive to turn smoldering embers into raging fire. It pushes and burns us into action. Anger provides the fire that fuels change. Nothing ever got done by those who were content. So my friends, be the cleansing fire that changes the landscape of humanity. Ignite your selves and arise anew.