10. The Supernatural Essence of Man and the Development of Humanity
Then, through this body-free thinking, one gets to know the first supersensible part of the human being, that which I have mentioned in my writings - names are not important, but one must have names for things - the etheric body or formative body. This is something that the human being carries within them, just as they carry their physical body, but it is something that cannot be grasped by the external senses and by ordinary thinking; it can be grasped when the human being develops this imaginative thinking - as I call it - which I have been talking about today. Then this imaginative thinking becomes a [mental organ] with which he sees the spiritual human content, the formative forces that permeate the human being, just as the human being has the physical body.