Yes, that is so. They are capable of materializing and dematerializing. Their energy field moves through what you might call a pattern or form that is thought and energies that would compare to your magnetic fields. It would compare to the gravitational fields that you can experience. Those are only energy field, never to be made manifest in thought and form, but it can be used to transmit thought form, thus giving thought form greater energy to manifest into a physical form.
Gravity is an energy field.
When gravity can be actually understood and managed, you can have an anti-gravitational field also. That which eliminates gravity while still in the form of the gravity field. All in the appropriate time frame. This is Light and I'm telling Hugh that you need to be careful of your physical bodies. As you would make all vehicles of your thoughts in space and time secure and comfortable, solid and powerful.