Emotions are energy. They rise up from deep inside of us and take form as they express themselves on the surface of our life. Our mind likes to have calm waters so our boat can travel through our life more comfortably and easily. But when the waves of emotion rise up too high, our mind resists and wants to control them. The only problem with emotions is our own resistance to the energy that comes with them.
When the emotion is still inside it is just pure energy or Shakti that has no expression until it reaches the surface and expresses itself in our life. If we can change our point of view and feel the energy of the emotion rather than the expression as a negative emotion, we can harness that energy and feel more comfortable with it. Even feeling the negative emotion without control or resistance to it, builds our ability to feel positive emotions like love without control or resistance. Energy in any form is useful if we can harness it and direct it in a positive direction. Energy is Life Force. Strong energy is called Shakti. We can use this energy for healing and for manifesting our desires.