Beware, my friend! of crystal brook,
Or fountain, lest that hideous hook,
Thy nose, thou chance to see;
Narcissus' fate would then be thine,
And self-detested thou wouldst pine,
As self-enamour'd he.
William Cowper
http://www.poemhunter.com/poem/on-an-ugly-fellow-from-the-greek/
