A young man one day showed a little impatience towards his aged father, who could not hear very clearly and had asked him two, three times to tell him again what he had said. Seeing the disturbed expression on his face the father said, "My son, do you remember that there was a day when you were a little child, and asked me what was the name of a certain bird? I told you: a sparrow. You asked me perhaps fifty times, and I had the patience to repeat it again and again to you without being hurt or troubled about it; I was only pleased to tell you all I knew. Now when I cannot hear you clearly, you can at least have patience with me and, if I did not hear you the first time, explain it twice to me."