|Book of Kells, f. 27v|
Another Irish writer applies the symbols to the Christian's life. The Lion represents the strong in faith; the Calf, the merciful; the Man, humility; and the Eagle stands for the mystic.
The ultimate source for these widespread symbols of the four evangelists is in Ezekiel 1.10 and Revelation 4.7. Next time you're in an old church keep your eye out for these four symbols, you're bound to see them somewhere.
(To my Corkonians, have you noticed them above the west front facade of St. Finbarr's Cathedral?)