Those who follow the Tao are of clear mind. They do not load their mind with anxieties and are flexible in their adjustment to external conditions.
ZhuangziHe 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.
Zhuangzi