Not weighing spirit, or explaining spirit with energy, the idea was to eliminate the word "spirit" from the conversation as I know that that word is not in your views and has no validity while reasoning with you.
Different people would or will have different views on the word "spirit".
Some do view spirits as energy. While others don't.
So it is dependent on how one would define "spirit".
In the real world, energy don't exist without some sort of sources, be that matters, anti-matters, dark matters, or one of those subatomic particles (eg. elementary particles).
Light, for instance, require a origin of source, eg would be light bulb, laser device, flame from fire, or emission from the Sun (or other stars). Light just don't come out of nowhere or from nothing. And it each one would require some sorts of energy to emit the light from the sources, like electricity for light bulb or laser device, the combustion of fuel and oxygen for fire, or the nuclear fusion of hydrogen fuel into heavier elements, like helium.
Both the pre-Islamic pagans and Muslims believed that djinns are spirits made out of smokeless fire. Christians believed that angels are winged beings, and the seraph angels as living fire, with 4 faces (or was that 4 heads; I can't remember which).
Other people might view spirits as consciousnesses that don't require the brains for its existence, is equally preposterous as those who think spirits are energies.
The problems with spirits are they are ill-defined, and certainly not understood by the people who believe in them, because of the variety of views that people have, and the ego of competing people, religions and mystics.