How do matter related to energy?

Basically every students are familiar with the definition of matter and energy. (Matter is anything that occupies space and has weight while energy is defined as the ability to do work.) But how does not familiar on how matter and energy related to one another. Though matter and energy and its interaction was called Physics. It is still puzzled. In this regards let me discussed this matter...

To start with let me remind you the formula which was fromulated by my favorite scientist Einstein. He state energy is the product of mass and squared of the speed of light. Every matter has its own mass. This is because proton and electron has constant mass value. And every matter has proton and electron so there is energy in every matter. In addition to this energy can observed through stationary position or moving position. This means that everything on earth has energy.