The student Doken was told to go on a long journey to another monastery. He was much upset, because he felt that this trip would interrupt his studies for many months. So he said to his friend, the advanced student Sogen:

“Please ask permission to come with me on the trip. There are so many things I do not know; but if you come along we can discuss them – in this way I can learn as we travel.”

“All right,” said Sogen. “But let me ask you a question: If you are hungry, what satisfaction to you if I eat rice? If your feet are lame, what comfort to you if I go on merrily? If your bladder is full, what relief to you if I piss?”