" Buddhism suddenly deteriorated in India sometime after the fourth century of the Christian era. It has been rightly said that Hinduism stifled it in its friendly embrace. Like Christianity and Judaism in Judea and Confucianism and Taoism in China, Buddhism had to be exiled from India for it to become a world religion. It was necessary for India to turn to a more primitive folk religion. Hinduism perfunctorily retained the name Buddha in a far corner of its pantheon, where he was preserved as the ninth of the ten avatars of Vishnu.

Vishnu is believed to assume ten transfigurations: Matsya, the fish; Kurma, the land tortoise; Varha, the boar; Narasimha, the man-lion; Vamana, the dwarf; Parashurama; Rama; Krishna; the Buddha; and the Kalki. According to the Brahmans, Vishnu, assuming the form of Buddha, purposely introduced a heretical religion so that believers would be led astray, thus presenting the opportunity for the Brahmans to lead them back to their true religion -- Hinduism.

Thus, along with the decline of Buddhism the cave temples at Ajanta in western India fell into ruin and became known to the world only twelve centuries later, in 1819, when a British Army corps chanced upon them. "

― Yukio Mishima , The Temple of Dawn