Thy trivial harp will never please
Or fill my craving ear;
Its chords should ring as blows the breeze,
Free, peremptory, clear.
No jingling serenader's art,
Nor tinkle of piano strings,
Can make the wild blood start
In its mystic springs.
The kingly bard
Must smite the chords rudely and hard,
As with hammer or with mace;
That they may render back
Artful thunder, which conveys
Secrets of the solar track,
Merlin  is a prophet and magician who has a central role in the legends associated with 6th century King Arthur and his court. 
