Before the performance at Carnegie Hall with Aldo Frescobaldi when Mr. Weisfeld visits Claude in his dressing room, what does Claude's frame of mind show about him?

Before the performance at Carnegie Hall with Aldo Frescobaldi when Mr. Weisfeld visits Claude in his dressing room, Claude's frame of mind shows that Claude is confident and completely in control, and is not nervous at all. Performing is what Claude knows best and is the area of his life in which he is most comfortable, so he is calm as he waits to perform.