The answer that completes the statement above is this: do not commit to goals and fail to take on any role. Generally, identity refers to the being of person that he or she choses to be. This is what defines someone and how he or she functions in the society. In Psychology, when we say identity diffusion, this is the stage in adolescence wherein they still do not know who they really are and are still trying to figure this out. While on this stage, they still cannot commit to any goals, thus, they cannot be successful yet on any role that they do in the society.