Read about the etheric heart in the book, The Heart as a Supersensible Organ of Perception, by Douglas Gabriel at:
Rudolf Steiner on the human heart:
Curriculum materials at:
Print sigils from this page:
Douglas Gabriel in the ‘Interviews with an Exorcist’ series are found at the playlist:
The Gabriels post at You can find them daily on Gab @Gabriels_Horn.