Question for Bordo

What is the difference between discipline and control? Is there a difference? Relative to Black Swan, Nina, the character played by Natalie Portman, is very disciplined in her practice of ballet and struggles to embody the black swan character, which in turn causes her to spiral out of control. However, I feel that it is her discipline and dedication to ballet, her dedication to embody the black swan, that causes her to loose control. So how is it that a person can feel like they are in control of their own body and actions when in fact they are not?