True, the first look into this spiritland is still more bewildering than the first glimpse into the soul world because the archetypes in their true form are very unlike their sensory reflections. They are, however, just as unlike their shadows, the abstract thoughts. In the spiritual world all is in perpetual, mobile activity in the process of ceaseless creating. A state of rest, a remaining in one place such as we find in the physical world, does not exist here because the archetypes are creative beings.
They are the master builders of all that comes into being in the physical and soul worlds. Their forms change rapidly and in each archetype lies the possibility of assuming myriads of specialized forms. They let the different shapes well up out of them, as it were, and no sooner is one produced than the archetype sets about pouring forth the next one from itself. Moreover, the archetypes stand in more or less intimate relationships to each other. They do not work singly. The one requires the help of the other in its creating. Often innumerable archetypes work together in order that this or that being in the soul or physical world may arise.
Source: Rudolf Steiner – Theosophy – Chapter III: The Three Worlds: 3. The Spiritland
Translated by Henry B. Monges and revised for this edition by Gilbert Church, Ph.D.