Energy is accelerated mass, where mass negates itself as volume through the actualization of form with mass in itself being formless.
Mass is 0 dimensional, thus formless. It is no different than 0d point space and 0d point space is formless.
Volume is form, as the projection of 0d space into 1 dimensional linear space.
Volume is thus inverted to further volumes, through mass, in which case density occurs.
One line inverted to many lines observes the basic line as composed of many lines, thus density occurs. This can be observed by simply folding a line in half as one line.
With the increase in density comes the increase in mass and decrease in volume.
Continually folding the line into a shorter and shorter line observes the new line as smaller than the original line.
With the decrease in density comes an increase in volume and decrease in mass.
Unfolding a line, where it doubles or triple observes the expansion of volume and the decrease in mass.