These two functions make man different from everything else in creation. These two functions make your outward appearance different from others. Your inner self is formed by these two functions, and is reflected in your outer characteristics. Energy is matter and matter is energy. God is energy.
Energy is a form of vibration.
Scientifically speaking, we are all a mass of energy. Me consistency of molecules God alone knows. Man is not sufficiently advanced. But we can change a molecule. Einstein said that, when man reached the point where he could perceive the theory of the fourth dimension, God will allow mankind to change the mass.