In John 6:69, Peter confesses Jesus as "the Holy One of God." Scholarly opinion on the meaning of the Holy One of God is deeply divided. The most common solution is that the title simply means "Messiah." This article argues against such a position and suggests instead that the primary meaning of the title is that of "representation" or "agency." In Mark and Luke, it is an agency of judgment on the demons.
Source: Tyndale Bulletin, 1993. 13 pages.