What was the importance of marcy in a beautiful mind?

Answer 1

Marcy was shown to represent Nash's hallucinations, even more than the others. She was a symbol of Nash's recognition of his illness and his willingness to seek treatment (such as when he says "Marcy can't be real, she never gets old," at which point he is submitting to whatever help he can get. Marcy was essentially representative of Nash's varying levels of mental health. For instance, she was more present when he was deeper in the throes of schizophrenia, and she tended to be present when Nash was presented with a dilemma.