Everything is energy, either positive (protons), negative(electrons) or neutral (neutrons). Everything!
Energy is the source of everything and it is everywhere. It's in the air all around us and all of this energy is connected.
Everything is comprised of energy and matter. You are energy and matter.
Your thoughts create a measure of energy, your words another measure of energy, and your actions another. Everything created or done by man was first created by the mind or consciousness. Humans manipulate energy to manifest what is in the mind. The point is, your thoughts matter.
Energy can neither be created nor destroyed, it can only change forms.
With awareness and practice you can manipulate your own energy. You can even feel the energy in your body vibrate.
Click here for an interesting read about energy.