Our physical body and our etheric body

Rudolf Steiner: The Threshold of the Spiritual World

Chapter 4: Summary of the Foregoing

Underlying man's physical being is a subtle, etheric human being which lives in an elemental environment, as physical man lives in a physical environment. The elemental outer world is incorporated in the supersensible etheric body of the earth. This latter proves to be the transmuted essence of an earlier or Moon-world, and the preparatory stage of a future world (Jupiter). One may give the foregoing schematically as follows. Man contains: —

I. The physical body, in the surrounding physical, material world. Through this body, man comes to recognize himself as an independent, individual being, or ego.

II. The subtle, etheric body in the surrounding elemental world. By its means man comes to recognize himself as a member of the Earth's etheric body, and hence indirectly as a member of it in three consecutive planetary conditions.

Source: https://wn.rsarchive.org/GA/GA0017/English/GPP1922/GA017_c04.html