How does Sam view Charley's concept of the Third Level? How was he entrapped into it?

Sam was a psychiatrist. He was also a friend of Charley. When Charley fantasied about the Third Level at Grand Central Station, he visited Sam for consultation. Sam declared it merely a ‘temporary refuge’ from his tension. He called it a waking-dream-wish-fulfilment. But slowly he himself got trapped in this imaginary world. He talked to many psychic patients daily, who told him about their woes and worries. It had made Sam's life a burdened one. He also started trying to find sojourn. He wanted to escape from the life which had become woeful after listening to the afflictions of the patients suffering from mental diseases.

Unconsciously, he also felt like breaking all the barriers of the realities of life and moved freely in the world of fantasy. He wanted to imagine himself in the world, where there are no repressed fears and conflicts embedded in the minds of the people. He first did not believe in the whim of the Third Level, but deep in his heart, he wanted to believe in this fantasy. He knew that Charley was not right, but he wished Charley to be right and then slowly he started finding the reality in a whim and got trapped.