III. The Elemental World and the Heaven World. Waking Life, Sleep and Death.

Now the astral body is the builder of the etheric body and indirectly—because the etheric body is in turn the builder of the physical body—also of the physical body. Everything that the astral body has built up piece by piece through the ages has been born out of the great cosmic astral ocean. Because only harmonious and sound laws proceed from this astral ocean, the work carried out by the astral body in building the etheric and physical bodies is originally sound and harmonious; but as a result of the influences which came to the astral body from outside, from the physical world, impairing its original harmony, there arise all those disturbances of the physical body which prevail in mankind today.