What's the difference between i.e. and e.g.?
c.1300, from fore + runner. Middle English rendition of Latin praecursor, in reference to John the Baptist as the forerunner of Christ. The Old English word was foreboda.
John the Baptist went before our Lord in this character (Mark 1:2, 3). Christ so called (Heb. 6:20) as entering before his people into the holy place as their head and guide.