The teaching about which I speak now is the teaching of the Sufis.
This teaching says the following about the angel and the devil: every action of a man, every step, every moment, every movement emanates either from the one or from the other. Emanations from both (result) are equally deposited in the human organism in the form of certain crusts of real tangible matter which one can examine and distinguish whether the crust is of one kind or another. Each crust obeys certain laws, leads to certain consequences. And in the case of man things whispered by the devil have a greater effect.
Gurdjieff Talk "Two Spirits" February 9th 1923