In Xenophon's Memoirs of Socrates, Hippias tells Socrates that instead of always asking questions about justice, he would do better simply to say, once and for all, what justice is. Socrates replies: "If I don't reveal my views on justice in words, I do so by my conduct." A modern parallel to Socrates' statement can be found in Martin Luther King's quote, "Peace is not merely a distant goal that we seek, but a means by which we arrive at that goal.”
What Socrates wanted to show is that we can never understand justice if we do not live it. King similarly noted that we won't achieve peace through our actions if inwardly we are a mess of anxiety and nuerosis. We can't expect the world to give us better than we give the world.
In antiquity, philosophy was a way of life akin to therapy or care of the soul. Socrates, the Cynics, Aristotle, the Epicureans and the Stoics all stressed that we can achieve autarkia, or inner freedom independent of external events. Autarkia is a self-sufficiency and peace of mind where we feel that we lack nothing, relying on our inner resources. To be liberated, we must turn our attention to the revolution within and to what we can control; our thoughts, emotions, and actions. In order to obtain autarkia or inner freedom, we must train ourselves for it.