孔子曰，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。

James Legge Translation

Confucius said, "There are three errors to which they who stand in the presence of a man of virtue and station are liable. They may speak when it does not come to them to speak;—this is called rashness. They may not speak when it comes to them to speak;—this is called concealment. They may speak without looking at the countenance of their superior;—this is called blindness."