When you live for others' opinions, you are dead.

"Every man has his secret sorrows which the world knows not; and often times we call a man cold when he is only sad."

黑色是光的颜色，不是黑暗的颜色。

解释：君主对发生在堂上、堂下、门廷之内的事都不知道，则虽是近处，却比百里、千里、万里之外更远。