I recall an Anglican abbot once saying that during the Vietnam War his monastery had many visitors and inquirers. He noted many of the young were deeply angry about peace. The irony of his observation is the irony of our predicament. The most difficult aspect of acquiring peace is simply having a God (other than yourself). If Christ is truly Lord of my life and all things work together for good, and I need take no thought for tomorrow, then how do I not have peace?
That same abbot also said, “The contemplative need go no further than his own heart to find the source of all violence in the world.”