This sentence comes from Lu Xun's speech "What happens after Nora leaves"

Dream, in this sentence, represents an ideal state or a pursuit of oneself.

"The most painful thing in life is waking up from a dream and having no way to go." This sentence is easy to understand. Dreams cannot be grasped, just like when you know that your dreams can no longer be realized in life. , what to do next? I don’t know, losing the goal you are fighting for means losing your direction. This is the most painful thing in life.

"Those who dream are happy." This means that when a person strives for his own goals and what he pursues, even if he encounters setbacks, he remains firm in his heart towards this goal. He continues to walk along this road, and no one is pouring cold water on him at this time. The cruel reality has not yet hit him (because he is dreaming and has not yet woken up). At this time, he is happy, just like he is confused. of happiness.

"If you don't see a way to go, the most important thing is not to wake him up." That is to say, if people in reality have not found a direction for their lives, don't wake up those who are doing it during the day. Don’t throw cold water on people who dream, because they are passionate about life and plan or imagine many beautiful paths for the future. Just let them run wild, and they will also enjoy it.

If they were awakened and exposed to the darkness and cruelty of reality, they would probably feel confused and confused as if they had fallen from heaven to hell, not knowing where to go.