This is the debt I pay   
  Just for one riotous day, 
  Years of regret and grief, 
  Sorrow without relief. 
  Pay it I will to the end -- 
  Until the grave, my friend, 
  Gives me a true release -- 
  Gives me the clasp of peace. 
  Slight was the thing I bought, 
 Small was the debt I thought, 
 Poor was the loan at best -- 
 God! but the interest!
Paul Laurence Dunbar
http://www.poemhunter.com/poem/the-debt/