What symptom did john Nash exhibit at the end of the movie?

At the end of the movie "A Beautiful Mind," John Nash exhibits a profound understanding of his schizophrenia and a remarkable ability to manage his symptoms. He continues to experience visual hallucinations, but he learns to recognize them as part of his condition rather than reality. This acceptance allows him to live a more grounded life, focusing on his achievements and relationships rather than being consumed by his mental illness.