Often, this work was difficult or painstaking to read due to its didactic nature, and caused the reader or audience to be put off or lost interest.
In practice, however, the term is sometimes used in a negative way.
Didacticism is a philosophy used to emphasize instructional and informative literature and art.
Throughout history, didactic plays demonstrated morality and simple truths to audiences all over the world. An Essay on Criticism by Alexander Pope, published in 1711, is didactic in nature, giving advice on writing critics and criticism itself.
Therefore, a literary work that is artistic can also have didactic properties.
Apparently, any literary work that teaches or implies a moral is considered didactic.