Irony

In the late 18th century, the Moravians bought perhaps three dozen or more enslaved laborers to supplement their work force in Bethlehem and in the nearby Moravian settlements of Nazareth and Gnadenthal. These purchases have been mourned and  confessed as sin by later Moravians.  

One of the Moravian ironies is that Moravian Christians simultaneously owned slaves and yet also lived and worshiped in a personal way with the enslaved.