kundalini:

"The ordeals of the Ninth Sphere are very fine and subtle. The doctor advises the devotee to fornicate, because otherwise, the doctor says he will become ill. Tattling women stir up fear in the wife; the so-called brothers of different organizations frighten the student. The magicians of darkness, disguised as saints, advise the devotee to spill the semen in a saintly manner. The so-called sages teach the aspirant negative Sexual Magic with the spilling of the semen. The manner of teaching, the sublime and mystic tinge that the tenebrous ones (disguised as saints) give to their doctrine succeeds in misleading the devotee and keeps him away from the Path of the Razor's Edge. Then the student falls into black magic. When the student goes astray, he believes he is wiser than the masters of Gnosis. Indeed, the failures of the Ninth Sphere, those who do not succeed in passing the very long and hard ordeals of this Arcanum, in fact become terribly perverse demons. Worst of all is that no demon believes himself to be bad or perverse. Every demon believes himself to be saintly and wise."

- Samael Aun Weor, The Perfect Matrimony