" When King Chuang of Ch 'u was thinking of attacking Yiieh, Chuang Tzii admonished him, asking: "For what reason is Your Majesty going to attack Yueh?"
" It is because its government is disorderly and its army weak," replied the King.
" Thy servant is afraid," said Chuang Tzu, "Your Majesty's wisdom is like eyes able to see over one hundred steps away but unable to see their own eyelashes. Since Your Majesty's troops were defeated by Ch'in and Chin, Ch'u has lost a territory of several hundred li. This proves the weakness of her army.
Again, Chuang Ch'iao has dared robberies within the boundaries of the state, but no magistrate has been able to stop him. This proves the disorder of her government. Thus, Your Majesty has been suffering not less weakness and disorder than Yueh and yet wants to attack Yueh. This proves that Your Majesty's wisdom is like the eyes."
Thereupon the King gave up the plan. Therefore, the difficulty of knowledge lies not in knowing others but in knowing oneself. Hence the saying: " One who knows himself is enlightened."

Once, when Tzii-hsia saw Tseng Tzii, Tseng Tzii asked, " Why have you become so stout? " " Because I have been victorious in warfare," replied Tzii-hsia. "What do you mean by that?" asked Tseng Tzii.
In reply Tzii-hsia said: " Whenever I went in and saw the virtue of the early kings I rejoiced in it. Whenever I went out and saw the pleasure of the rich and noble I rejoiced in it, too.
These two conflicting attractions waged a war within my breast. When victory and defeat still hung in the balance, I was thin. Since the virtue of the early kings won the war, I have become stout." Therefore, the difficulty of volition lies not in conquering others but in conquering oneself. Hence the saying: " One who conquers himself is mighty. "

― Han Fei Tzu