Two quotes that I find particularly inspiring come from two of the great moral leaders of the 20th century, Gandhi and Martin Luther King, Jr.
Gandhi suggested that we should each "be the change you want to see in the world," which very succintly advises that we are all responsible for social action, social change, and we must accept this responsiblity ourselves before expecting others to do so.
King famously said that "Darkness cannot drive out darkness, only light can do that. And hate cannot drive out hate, only love can do that." The wisdom in these words is clear. Again, we are advised to choose the right path to change and not simply react, reciprocate and "give what we get".