The Spirits' Book
Book One - First Causes
Chapter II - General Elements of the Universe
Properties of Matter
29. Is ponderability an essential attribute of matter?
“Yes, for matter as you understand it, but not matter that is considered the universal fluid. The ethereal and subtle matter forming this fluid cannot be measured by you, and yet it is the source of your matter that can be weighed.”
Gravity is a relative property. Beyond the realm of gravitational pull between planets and stars, there is no such thing as weight, just as there is neither up nor down.