Why does millicent want to join the sorority

Millicent is a character of the short story entitled "Initiation" written by Slyvia Plath. In the beginning, Millicent was invited to join the sorority. Initially, she wanted to join the sorority in order to fit in or conform to the norm of the society. However, during the course of the initiation process she realized that she wanted to become true to herself than be involved in the sorority. 

You can say in conclusion you always want to work hard and never give up because you need to prove yourself that your strong enough tana brave enough you want and need to reach each and everyone of you goals to achieve all your hard work that you have don’t