Nixon was inaugurated as president on January 20, 1969, sworn in by his onetime political rival, Chief Justice Earl Warren. Pat Nixon held the family Bibles open at Isaiah 2:4, which reads, "They shall beat their swords into plowshares, and their spears into pruning hooks." In his inaugural address, which received almost uniformly positive reviews, Nixon remarked that "the greatest honor history can bestow is the title of peacemaker" a phrase that would later be placed on his gravestone.