Suffering.

         An older student came to Otis and said, " I have been to see a great numbers of teachers,
          and I have given up a lot numbers of pleasures. I have fasted, been celibate, and
          stayed awake nights. I have given up everything that I've been asked for, and I have suffer,
          but I have not been enlightened. What should I do?"
       Otis replied, " Give up suffering".
                               (Zen without Zen masters)