Litany for Peace
the Prince of Peace, not the Prince of Pre-emptive War.
The Litany for Peace includes one of my favorite prayers for peace, from the Book of Common Prayer:
Eternal God, in whose perfect kingdom no sword is drawn but the sword of righteousness, no strength known but the strength of love: So mightily spread abroad your Spirit, that all people may be gathered under the banner of the Prince of Peace, as children of one Father; to whom be dominion and glory, now and for ever. Amen.
Also worth checking out: cyberfriend Jon has an excellent post on his blog about the quote from the Sufi mystic Rumi, "Sell your cleverness, and buy bewilderment" (the post dated November 10th).