He that made with his hond
Wynd and water, wode and lond;
Geve heom alle good endyng
That wolon listne this talkyng,
And y schal telle, yow byfore,
How Merlyn was geten and bore
And of his wisdoms also
And othre happes mony mo
Sum whyle byfeol Engelonde. (Of Arthour and Merlin, c. 1260)
Did a historical Merlin really exist? Was there ever a mysterious Druid who stood as a hinge between the "old religion" and Christian Britain? Did he walk the sacred forests and counsel the young King Arthur? Did he rebuild Stonehenge as the final resting-place for his father, Ambrosias, bringing the capstone all the way from Ireland to serve as his memorial? Did he arrange both the conception and the coronation of the young king who would be a beacon to all kings? And does he sleep now in his crystal cave, awaiting the restoration of all things?
If not, we would probably have had to invent him. His is just too good a story to miss. Every year, it seems, someone comes out with a new twist, a new interpretation, a new way of understanding. He has been discovered by young boys who want to be knights of the round table, young girls who want to know more about the feminine presence in Avalon, new-age Druids who want to know more about magic, Wiccans who want to understand the natural world, and publishers who want to make more money by dipping again into the tried and true.
Some feel Merlin is completely a figure of British mythology, invented by Geoffrey of Monmouth in his History of the Kings of Britain to serve as a connection between the old Celtic religion of Druidism and King Arthur's acceptance of Christianity. Others feel the Merlin we know is a composite of any number of prophets and wizards who lived in the hills of ancient Britain. Still more believe that any story with such a long and illustrious history must be based in fact. And a few believe in Merlin just because they are unabashed, unrepentant romantics. (Ask any of the millions who flock to see the Lord of the Rings movies, in which Gandalf is a Merlin clone.)
Nikolai Tolstoy has written a book describing his quest to find the historical Merlin. He presents the thesis that Merlin did exist, though not as a contemporary to Arthur. After reading ancient manuscripts and walking the Scottish lowlands, he came to believe that Merlin was a Druid who lived in the north after Britain was left alone following the collapse of the Roman Empire. If this is the case, Merlin represents an old religion going back to prehistoric times when Bronze-Age Britain was dealing with the religious implications of the new Iron Age.
However Merlin is presented, the aspect of the hinge between two religious cultures, two spiritual worldviews, seems always to be present. When the new replaces the old, you need a guide. Merlin was that guide.
Think, for a moment, about the implications of this particular clash of religions. It required the people to completely change everything about the way they viewed the world. Celtic religion was all about connection with nature. Gods and spirits were everywhere. Nature itself was the church. The religious calendar was based on the position of the sun and the phases of the moon. Woodland sprites and fairies of the hill competed for the offerings left on roadside shrines. The environment was the religion. And humans were subject to it.
Then along came Christianity. Now humans were separate from nature. People were expected to subdue the earth, not to try to placate it. Fairies and woodland sprites became devils and demons.
It didn't help the confusion any when the church began to "baptize" Merlin's religion after discovering they couldn't root it out. Merlin's sacred groves were cut down, decorated with holly, and brought right into the house on Christmas Eve. His gods were made into saints. His sacred fire at the winter solstice became the Yule log fire. It took some getting used to. But Merlin, far-seeing prophet that he was, was there to guide the way. He knew the gods were just taking on a new incarnation. He knew the goddess would surface as Mary, the Mother of God. He knew Jesus was just another expression of the god taking on human form.
So he was there to soften the blow, accept the inevitable as the whim of God, and prepare the way for the new age.
(See also Arthur)
Sources: Tolstoy, Nikolai. The Quest for Merlin. Boston: Little, Brown, 1985.