Our ordinary experience and our education has led us to believe that the only substance is physical, but both the ancient wisdom and modern quantum science say that everything that exists has substance. We must accept this principle and realize that even thoughts and feeling are “substantial”—consisting of substance. These are not physical substance but astral and mental substance. When metaphysicians and psychics, and even a growing number of parapsychologists and other scientists, speak of planes or worlds—physical/etheric, astral, mental, and spiritual—they are recognizing the existence of different kinds of substance. These substances are distinguished by distinct ranges