Rudolf Steiner: "The torch of all knowledge is lit in the astral body and conscious knowledge is reflected in the etheric body."
First Class Lesson #16: Physical sheath {the human being = Anthroposophia}
17: Etheric sheath {The Holy Spirit} (Manas} {Imagination}
18: Astral sheath {The Holy Spirit and Christ} (Buddhi) {Inspiration}
19: Egoic sheath {The Holy Spirit and Christ and the Father} {Atman} {Intuition}