In September 1948, Nash entered a university in Princeton. He showed interest in mathematics; topology, geometry, game theory and logic. All of these were among his interests but he escaped to talk about these subjects.
Years later, he starts to teach lessons in Princeton University. He also works in MIT ’s Wheller Laboratory to work out Russian’s potential energy.
In February of 1957 Nash married Alicia (his department’s student). In1958, his wife was pregnant. A few months later Nash’s mental state became very worried.
He started to think that he was a great man because of his ideas. He began to hear voices all the time. He hears telephone calls in his head. He also sees some men.
John doesn’t accept medication. He only wants to live in a world of dreams forever...
His wife takes him to a neuropathy hospital because his hallucinations mix up his mind.
He stays in neuropathy hospital ten weeks, he has undergone lots of crisis in there and the doctors gave insulin shocks him five times a day.
Although spending periods in hospital, his mathematical work continued successfully. He said; “ I would not say that there is a direct relation between mathematics and madness, but there is no doubt that great mathematicians suffer from maniacal characteristics.”