"Each action of the actor on the stage should be the visible concomitant of his thoughts"

This quote by Sarah Bernhardt is stressing the importance of an actor's physical performance being in sync with their internal ideas and feelings. She is suggesting that a star's body movement and motions need to be a reflection of what they are thinking and feeling. This implies that a star ought to be able to communicate their thoughts and feelings through their physical performance. This is very important since it permits the audience to connect with the character and understand their inspirations and feelings. It likewise permits the star to fully embody the character and bring them to life. By having the star's physical performance match their internal thoughts and sensations, the audience can be fully immersed in the story and the character's journey.