Once upon a time a Chinese student went to his teacher. He asked his teacher a question. "Sir, is there any good in talking a lot? The teacher replied: "toads and frogs croak night and day, but no one pays any attention to them. But the cock crows at a certain time of night and wakes us up every morning. The teacher smiled at his student and said, “this proves that no good is achieved by talking a lot; what is important is to say the right thing at right time."