He who dreams ... does not know he is dreaming... . Only when he awakens does he know he has dreamt. But there is also the great awakening (ta-chiao), and then we see that [everything] here is nothing but a great dream. Of course, the fools believe that they are already awake-what foolishness! Confucius and you, both of you, are dreams; and I, who tell you this, am also a dream.
ZhuangziThose that think that wealth is the proper thing for them cannot give up their revenues; those that seek distinction cannot give up the thought of fame; those that cleave to power cannot give the handle of it to others. While they hold their grasp of those things, they are afraid of losing them. When they let them go, they are grieved and they will not look at a single example, from which they might perceive the folly of their restless pursuits - such men are under the doom of heaven.
ZhuangziCompare birth with death, compare death with life; compare what is possible with what is not possible and compare what is not possible with what is possible; because there is, there is not, and because there is not, there is.
Zhuangzi