What evidence is there that we've adequately empathized with the other person? First, when an individual realizes that everything going on within has received full empathic understanding, they will experience a sense of relief. We can become aware of this phenomenon by noticing a corresponding release of tension in our own body.
Marshall B. RosenbergThe Chinese philosopher Chuang-Tzu stated that true empathy requires listening with the whole being: The hearing that is only in the ears is one thing. The hearing of the understanding is another. But the hearing of the spirit is not limited to any one faculty, to the ear, or to the mind. Hence it demands the emptiness of all the faculties. And when the faculties are empty, then the whole being listens. There is then a direct grasp of what is right there before you that can never be heard with the ear or understood with the mind.
Marshall B. Rosenberg