"The world is not yet at peace, because the Mongols have not yet conquered it."

"Conquering the world on horseback is easy; it is dismounting and governing that is hard."

"Heaven has appointed me to rule all the nations, for hitherto there has been no order upon the earth."

"The strength of a wall is neither greater nor less than the courage of the men who defend it."

"It is not sufficient that I succeed, all others must fail."