I sometimes hold it half a sin 
      To put in words the grief I feel; 
      For words, like Nature, half reveal 
   And half conceal the Soul within. 
   But, for the unquiet heart and brain, 
      A use in  measured language lies; 
      The sad mechanic exercise, 
   Like dull narcotics, numbing pain. 
   In words, like weeds, I'll wrap me o'er, 
     Like coarsest clothes against the cold; 
     But that large grief which these enfold 
  Is given in outline and no more.
Alfred Lord Tennyson
http://www.poemhunter.com/poem/in-memoriam-a-h-h-5-sometimes-i-hold-it-half-a-s/