What is the classical literature of kundalini yoga?
The classical works of hatha, kriya and laya yoga include: Gorakshashatakam, Hatha Yoga Pradipika, Gherandha Samhita, Shiva Samhita, and a group of about twenty works known as the Yoga Upanishads. References to translations of these works will be given in the answer to the question Where can I learn more?> Each of these works is very brief, typically less than 500 verses and yet the entire literature of hatha, kriya and laya yoga is drawn from these works. Anyone interested in kundalini yoga can benefit from taking the time to read these classical works but to actually practice the techniques described in these works a teacher is required. This is reiterated within the text of these works themselves.
