Reading and writing fill in the blanks
One of the most important things to remember is that "classic" does not necessarily translate to "favorite" or "bestselling". Literature is instead considered classic when it has stood the test of time; and it stands the test of time when the artistic quality it expresses – be it an of life, truth, beauty, or anything about the universal human condition – continues to be relevant, and continues to inspire emotional responses, no matter the period in which the work was written.
Indeed, classic literature is considered as such of book sales or public popularity. That said, classic literature usually merits lasting – from critics and other people in a position to influence such decisions – and has a universal appeal. And, while effective use of language – as well as technical excellence – is a must, not everything that is well-written or is characterized by technical achievement or critical acclaim will automatically be considered a classic. Conversely, works that have not been acknowledged or received by the writer's contemporaries or critics can still be considered as classics.