Another denies that God actually has created wholly good beings who freely choose good. So the very authorities Peter cites seem to deny the possibility of the creatures Peter claims exist. Peter's definition of angels also raises many questions. Energy is physical. Einstein said e equals mc squared.
Energy is as physical as matter.
Peter's analogy of spirit with abstract objects such as the number six is also confused. It has no capacity to think, no values and no will. Indeed the idea that the number six can be classified as evil or good, as Peter classifies angels, simply demonstrates that a better analogy is needed. Naturally, I agree that abstract objects exist. I work with computers and I analyse the workings of my computer in terms of abstract, non-material objects objects such as numbers, software objects, software classes, programs, queues etc etc.