如果你没有做错什么，你就没有什么可隐藏的。

最危险的武器不是杀人的武器，而是改变思想的武器。

真正的数学家始终是学生，永远在学习。

The speech we hear is an indication of that which we don't hear. It is a necessary avoidance, a violent, sly, anguished or mocking smokescreen which keeps the other in its place.