In the Analects, Confucius says: “In attending on a gentleman, there are three errors. To speak before it is one’s turn to speak is called rashness. Not to speak when it is one’s turn is called concealment. To speak without first watching his expression is called blindness.” (侍于君子有三愆：言未及之而言谓之躁，言及之而不言谓之隐，未见颜色而言谓之瞽。)