The universal mantra AUM, now known throughout the world, is the essential spiritual vibration of the universe. Sanskrit, the language of the Vedas, is said to have been revealed and it is claimed that the sounds that form its 50 letters and perfect grammar are unique. A great many hymns, ceremonies and philosophical matters are contained in the Vedas, the principal sections of each Veda being Samhita (hymns), Brahmanas (ceremonies), and Aranyakas (philosophical treatises). The Upanishads are usually contained in the last section. The vibration which is generated by the holy sounds is spiritual in nature and counters the dark forces of inert matter in an effort to uplift creation. The Upanishads are the doctrine of the lifting of your own self to the Self of the universe, the Spirit which you are.