“Mantra” means word of power. All ancient traditions, like Christianity, say that in the beginning it was the word, and everything by him was created. Today, materialistic science has not found matter, instead it has only found vibration, to the extent that Einstein asserted: “Nothing happens until something moves.” Such is the power of the word. The Buddha Maitreya and Kalki Avatar –V.M. Samael Aun Weor– has provided the wisdom of the word in these modern times, delivering a multitude of mantras so that we can use their power for our benefit and for that of the human species. All those mantras are compiled in this work, in an orderly manner, with their meaning explained and with their correct pronunciation. Never before has the magic power of the mantric word been made available to the whole of mankind, and with it, the responsibility to use it righteously.