Putting one's emotions out there in a truthful way is crucial for any singer and for the audience as well. For some people, sharing emotions is the very core of their reason to be on stage or to go to see a performance. The use of the emotions of the singer modifies the messages that the nervous system transmits to the vocal folds for the best or the worst, depending on his skill or level of neuro-emotional coordination.
How does one use the brain and what awakens the emotions, which are part of the symbolic representations perceived by the subject, in an optimal way?
How can we stimulate and use the perceptive parts of the body (vision, hearing, proprioception, feeling) in order to master that coordination?
How can you feed your voice with this inner life?
How can you find the balance between "being cold on stage" and being "over the top".
This coordination can be developed using either acting approaches, such as subtext, context, Stanislavski's system, or personal development approaches such as optimization of self, Alexander technique, elements of psychotherapy.
As I'm not (at all!) a therapist, what I'm doing as a teacher is making sure the student has access to the best tools for the use his or her neuro-emotional system, yet without entering in the potential issues of that individual.
The very nature of that coordination makes it a delicate subject and it requires care, respect and perseverance on the part of both the student and the teacher.
The desired goal is the unique and truthful expression of the individual in a mastered and serene manner.