There is one world, one peace, one heart, one being. Seek to be of this, in love. Through love - to love all, this will convey global peace and healing.
Once, on the ninth day of Av, the anniversary of the destruction of the Temple, he happened to be in a community whose members had for a long time been nursing a quarrel which grew more and more involved and difficult to end. One of the factions approached him with the request to arbitrate. "But the rabbi," so they said, "will probably not want to bother with our affairs in this period of mourning."
"No day is better than this," he replied. "For it was because of an idle quarrel that the city of God was destroyed."