Lecture IV

When we consider the earth from the ordinary physical standpoint we see it is made up of what we call earth, water, air, and fire. These are the four primary conditions of external matter. That to which Spiritual Science gives the name of “earth” is called “solid”; everything fluid (not only water but quicksilver, for instance) is called “water”; everything in the shape of gas, “air”; everything that can be perceived as having any degree of warmth is thought of as permeated with a finer substance, this we call “substantial warmth.”