There are two kinds of energy. Kinetic energy is electrostatic motive force carried by moving matter and vibrating matter/atom/electron. Potential energy is stored kinetic energy within matter. Energy must coexist with mater.
All energy is came from matter formation. Opposite charged particles attract each other to form atoms. Atoms carried its formation energy and constantly vibrate.
Energy is immortal, energy cannot radiate into space. The sun will never die. Big Bang theory is imaginary.
The universe is made from charged particles. Same charged particles repel each other, opposite charged particles attract each other, thus atom/matter able to form. F=Ke x pq/rr is the basic law of the nature.
Any two line of sight electrons repel each other constantly with force F=Ke x ee/rr. That force is the conductor of light energy/vibrating electron's kinetic energy, connected the two electrons as one.
It is important to realize that in physics today, we have no knowledge of what energy is. Richard P. Feynman