As the implicit meaning of a text is the hidden meaning that the author gives intentionally, or unintentionally to a text, the comparission between the parrot and the poet´s madness is beautiful and finding the closeness and relativeness of this is discussin the hidden meaning of a text.
I don't know much about assonance but what I can say is that it is the repetition of a vowel sound if I'm wrong please tell me I would really like to know what's the answer good luck have a nice day.