V. Can a method of gaining insight into spheres beyond the sense-perceptible world be given a scientific basis?

To approach the concept of matter in the spiritual scientific sense, we will do best, first of all, to get a picture of what it is. It will merely serve to illustrate. If we have a bottle of soda water with carbon dioxide bubbles in it, we see above all the bubbles. The carbon dioxide is really much thinner than the surrounding water, and the bubbles are embedded in the water. One would like to say, relatively speaking, of course: They are carbon dioxide, but there’s relatively less, compared to the water. So we really see an embedded nothing.