Mantras are the same sound frequencies used to move enormous stones, as seen in all antedeluvian structures, the pyramids, and in the modern Buddhist temples built in the present day. Chanting voices, bells, bowls, the resonance of OM in human voice - why eastern music sounds nasal to western ears - this is why mantras exist and are used.
The etymology of my given first name at birth which means VICTORY, My birth last name? THE LION'S ROAR. Even my HORSE'S NAME (as he came with it) meant DIVINE PROPHECY.