Focused, organized energy is also what matter is made of. All three dimensional mass is concentrated energy. Einstein proved it with E=MC squared.
Energy (IS, EQUALS) Mass times a Constant.
The constant can be thought of as a Distortion Factor, or Transformation Factor, which acts on Energy to create Mass. Mass is energy in a form. Mass is focused energy and we have defined focused energy as an impulse force.
Therefore, Mass, the three dimensional matter that we interact with in this plane of expression, is made up of impulse forces.
Ponder that and get comfortable with it, for tomorrow we shall explore methods of incorporating this new knowledge into our daily lives, and how to use it to our advantage.