Samaya Tantra and Raja Yoga (Yoga Sutras) are similar, though the Samaya Tantra practice is subtler, and is a path practiced by very few people. It is the most advanced of the schools of Yoga and Yoga meditation. Samaya Tantra practices Sri Vidya, the mother of all the vidyas (ways of knowing). Because of its subtler nature, and the fact that the higher teachings are imparted in meditation, rather than on meditation, there is far less written about Samaya Tantra than Kaula Tantra or Raja Yoga. The aspirant purifies the samskaras through the fire of guru chakra, as well as receiving the downward flowing intuitions.