Peace is built on the foundations of other spiritual practices: connections, compassion, justice, unity. It is a goal of all spiritual people. Peace is an inner state of well-being and calm. It is also an outer project of promoting nonviolence, conflict resolution, and cooperation in the world.
Practice peace by refusing to participate in violence either directly or indirectly. Try to stay composed no matter how agitated the people around you become. Meet conflict with equanimity. Disarm yourself — lower your guard — as a first step in disarming the world.
The inner mirrors the outer. Those conditions that upset the equilibrium of the world — anger, aggression, discord — upset our inner peace as well. You need to deal with them on both levels. Encounters with violence — a contrast to peace — invariably demonstrate the importance of this practice.
Feeling worried, upset, or “crazed” can also get you started doing peace. These states often signify that your emotions have gotten the best of you, and a practice to restore your equanimity is needed. Being even-tempered creates a feeling of serenity. And whereas being agitated can drain your energy, inner calm increases your stamina so that you can sustain your efforts to make the world a more peaceful place. This time the inner supports the outer.
Source: Spirituality and Practice