"I have been in a multitude of shapes,
Before I assumed a consistent form.
I have been a sword, narrow, variegated,
I will believe when it is apparent.
I have been a tear in the air,
I have been the dullest of stars.
I have been a word among letters,
I have been a book in the origin.
I have been the light of lanterns,
A year and a half.
I have been a continuing bridge,
Over three score river mouths."
Taliesin or Taliessin (c. 534 – c. 599) is the earliest poet of the Welsh language whose work has survived. His name is associated with the Book of Taliesin, a book of poems that was written down in the Middle Ages. His name means "Radiant Brow" (tal iesin in Welsh).
More at ~ http://en.wikiquote.org/wiki/Taliesin