It is a terrible error to let any natural impulse, physical or mental, stagnate. Crush it out, if you will, and be done with it; or fulfil it, and get it out of the system; but do not allow it to remain there and putrefy. The suppression of the normal sex instinct, for example, is responsible for a thousand ills. In Puritan countries one inevitably finds a morbid preoccupation with sex coupled with every form of perversion and degeneracy.
Aleister CrowleyTo train the mind to move with the maximum speed and energy, with the utmost possible accuracy in the chosen direction, and with the minimum of disturbance or friction. That is Magick. To stop the mind altogether. That is Yoga.
Aleister Crowley