Purpose of a play/art

Hamlet, in scene 3.2 mentions what he believes the purpose of plays are. In lines 23 he says, "to hold, as 'twere, the mirror up to nature; to show virtue her own feature, scorn her own image, and the very age and body of the time his form and pressure." He believes that the "purpose of playing" is to reveal the truth. I agree with Hamlet because in many forms of art such as movies, writings and drawings the creator of these things are trying to display some sort of a message and what they believe to be true to their audience. In class, we have been writing about memories and reading them to our peers. As we write, we are telling the truth, displaying honesty with one another. Hamlet wants to reveal the truth to everyone, hoping to unveil King Claudius' secret of killing King Hamlet. By doing this through a play, it will grab the attention of the audience portraying a truthful message to them.