"The medulla oblongata is like a bridge between the objective and subjective modes of mental activity. The back of the head. In this part of the brain are the instruments which the Life-Power has developed through the ages of evolution. establishing in them new habits of action which. and to the paths on the Tree of the Living Ones entitled Corporeal Intelligence. again. it is most useful to stimulate these cells direct by auto-suggestion. corresponding respectively to the letters Qoph. but this is not its only office."

Watch out, the linked pdf file is huge.