Now coming to the Buddhistic and Vedantist religions and philosophical schools, we find the words that have been used for many thousands of years, the same words even to-day are used. For the Hindus it has been a kind of science, the science which they called Mantra Yoga, the science of the word, the dynamic power, the vital power that lies in the repetition on certain words. I have spoken about it in the "Mysticism of Sound," yet it is never sufficient, there is so much that can be spoken on the subject.