If you’re going to preach in the modern world you need powerful language. The Missionaries of the Precious Blood have had that power incorporated into their very name for the last 200 years. From “blood brothers” to “Bloody Sunday,” “the blood of the Lamb” to “blood libel,” the 600 priests and brothers who call themselves Precious Bloods have the most arresting imagery in the entire story of human salvation as their calling card.