A well-known illustration is Hector Berlioz's Symphonie fantastique, which describes a drug-induced group of unhealthy illusions concerning the unanswered emotion of a fine-tuned poet including killing, shooting, and the sufferings of Hell.
The symphony represents his attraction and desires, scenes and notes of kindness, and hopelessness.
I do believe that the hardest part of an art critique is all based on opinion. Some have trouble with finding flaws, some with finding the good things. It all depends on you.
