The film “A Beautiful Mind” tells the story of the extremely brilliant mathematician John Nash, who suffers from paranoid schizophrenia. Ron Howard directed this film and is based on the true story of genius mathematician Nash, played by Russell Crowe. At the beginning of the film, John begins his career at Princeton University, as a mathematics student, where he was well known for his intelligence. Nash is an arrogant and socially awkward student, who spent most of his time holed up in his room or library trying to discover an impossible equation in mathematics that would make him one of the greatest (Albert Einstein, Plato, Galleo ). In the middle of the film we find out a lot if the places and situations that occur are just an illusion in Nash's "beautiful mind". At this point we learn that Nash suffers from a serious mental illness, namely paranoid schizophrenia. Schizophrenia has been defined as a split mind, referring not only to multiple personalities, but also to a separation from reality that manifests itself in the form of unorganized things, emotions, and irrational actions. Nash suffered from extreme delusions and hallucinations which were later diagnosed as symptoms of paranoid schizophrenia. Nash showed signs of both negative and positive symptoms, such as disorganization, delusions, random laughter, and extreme calm. One of the first imaginary characters he developed was his roommate Charles Herman, an English literature student. Cognitive-behavioral psychotherapy is known to be the most effective type of therapy for treating this mental problem. Cognitive therapy is a specific type of therapy that teaches people more new, adaptive ways of thinking and acting. The treatment was involved in ...... middle of paper ......, Parcher and Marcee constantly appear, Nash learns to ignore them and act as if he doesn't see them. Even though he suffered from serious mental illness, he worked hard and developed a theory that would win him the Nobel Prize in Economic Sciences. Martin asks him at the end of the film if he has seen Marcee, Charles and Parcher yet. Nash responds positively: “No, but I have a habit of ignoring them and, as a result, they have kind of abandoned me. I think it's a bit like nightmares and dreams, you have to feed them to keep them alive. This shows Nash's great metal will, strength and ability to overcome anything he wants. John Nash, I believe, was used as an example that just because you have a mental illness should never stop you from doing what you love to do or doing what you're supposed to do..