"On his side the doctor should study that branch of the ‘occult’ sciences which deals with man’s etheric double and his centres of force behind the endocrine glands; and also with the seven inter-penetrating states of living substance of which man is formed — physical, etheric, astral or emotional, concrete mental, abstract mental or soul) and spiritual. Between them they should ascertain on which of these ‘planes’ the chief interest of their patient is focussed."