From Kiriyama and Agonshū, Asahara also drew upon a variety of ideas and practices that would become important in Aum: expressions of esoteric Buddhism, mystical forms of yoga, and forms of self-purification aimed at freeing oneself from bad karma. He was also much influenced by Agonshū’s use of American New Age elements from the human-potential movement, individual psychology, and applied neurology. It was here as well that he first encountered the writings of Nostradamus, the sixteenth-century French astrologer and physician who predicted the end of the world with the coming of the year 2000. Asahara, who was to radically alter, supplement, and totalize these influences, soon became a fledgling guru, acquiring a few disciples by the time he left Agonshū.