 Vajrayana Buddhism was also known as Tantric Buddhism and Mantrayana, the esoteric teaching, which was conveyed only by a master to a disciple through initiation or empowerment.Vajrayana means Adamantine Vehicle or Diamond Vehicle that shows the way to awaken the Enlightenment.Mantrayana comes from the word mantra, which means words (incantation, spell, oath) of special vibrations.