A moth, I thought, munching a word.
How marvellously weird! a worm
Digesting a man's sayings --
A sneakthief nibbling in the shadows
At the shape of a poet's thunderous phrases --
How unutterably strange!
And the pilfering parasite none the wiser
For the words he has swallowed.
Anonymous Olde English
http://www.poemhunter.com/poem/the-bookworm-3/