In Edgar Allan Poe’s the Man of the Crowd, we observe that the man’s reviving from the verge of death during his convalescence is due to his yearning to the unknown and pursuit of the truth. The narrator is once enchained by a decrepit old man’s absolute idiosyncrasy and examines this mysterious man by following him in the dark streets of London. Eventually, the narrator realizes that he could never read this old man by observation and only comes into the thought that the old man with diamond and dagger “is the type and the genius of deep crime” and “he is the man of the crowd.” Here, the old man is the truth for the narrator. Poe shows us the way that the narrator tries to use reason to know the world, the limitation of reason’s ability, and the possible failure of pursuing the truth. However, this failure should not be taken as meaningless or irreparable. In fact, knowing his impossibility could teach us an alternative way to better approach truth. That is, by Baudelaire’s idea, a return towards childhood, to re-be the figure of child, to look at the world through a child’s fascinated eye with curiosity and interests, and to go back to the moment before we are taught reason.