To answer this question, you need to specify the work of literature you are referring to.
Once you tell me the title of the work, I can provide you with a detailed explanation of why it is considered a classic. Here are some general reasons why a work might be considered a classic:
* Universality: The themes and characters resonate with readers across time and cultures.
* Literary Excellence: The work displays exceptional writing skills, masterful use of language, and innovative literary techniques.
* Historical Significance: The work reflects its time period and its impact on society and culture.
* Enduring Popularity: The work continues to be read and enjoyed by generations of readers.
* Critical Acclaim: The work has been widely praised by literary critics and scholars.
Please provide the name of the work you're interested in, and I'll help you understand why it's a literary classic.