Pure energy.

"What is your body made of? Tissues and organs. What are tissues and organs made of? Cells. What are cells made of? Molecules. What are molecules made of? Atoms. What are atoms made of? Sub- atomic particles. What are subatomic particles made of? Energy? No. They are not made of energy; they are energy. You are one big "chunk" of energy. And so is everything else."

--The Secret