I wholeheartedly counsel this system mainly because it teaches you to exercise meditation in the “inside of out” – independently. To forestall the sages from attaining moksha, the asuras used to disturb them and occasionally attacked them though deep in meditation. The sages prayed to Shiva for assistance. ॐ https://www.youtube.com/watch?v=nDcLbHwNpE8&t=8s