A Way of Self-Knowledge and The Threshold of the Spiritual World by Rudolf Steiner (CW 16/17)
PART 1: A WAY OF SELF-KNOWLEDGE
1. Introductory Remarks and Meditation 1: The Physical Body
2. Meditation 2: The Elemental (or Etheric) Body
3. Meditation 3: Clairvoyant Cognition of the Elemental World
4. Meditation 4: The 'Guardian of the Threshold'
5. Meditation 5: The Astral Body
6. Meditation 6: The "I" - Body or Thought-Body
7. Meditation 7: The Nature of Experience in Suprasensory Worlds
8. Meditation 8: Beholding Your Previous Earthly Lives
9. Afterword to the 1918 Edition
PART II: THE THRESHOLD OF THE SPIRITUAL WORLD
11. Aphorism 2: Cognizing the Spiritual World
12. Aphorism 3: The Human Etheric Body and the Elemental World (with Summary)
14. Aphorism 5: The Astral Body and Luciferic Beings. The Nature of the Etheric Body (with Summary)
15. Aphorism 6: The "Guardian of the Threshold." Some Characteristics of Suprasensory Consciousness.
17. Aphorism 8: The Boundary between the Sensory and the Suprasensory Worlds.
18. Aphorism 9: On the Nature of the Spiritual Worlds.
19. Aphorism 10: Cosmic Beings of the Spiritual Worlds.
20. Aphorism 11: On the First Rudiments of the Physical Body.
21. Aphorism 12: The True "I" of the Human Being. (with summary and further Remarks)