A master calligrapher was writing some characters onto a piece of paper. One of his especially perceptive students was watching him. When the calligrapher was finished, he asked for the student's opinion - who immediately told him that it wasn't any good. The master tried again, but the student criticized the work again. Over and over, the calligrapher carefully redrew the same characters, and each time the student rejected it.
Finally, when the student had turned his attention away to something else and wasn't watching, the master seized the opportunity to quickly dash off the characters. "There! How's that?," he asked the student. The student turned to look. "THAT.... is a masterpiece!" he exclaimed.