The Path of Paradox
"While lists of siddhis in India are as numerous as varieties of cheese in France, nearly all may be categorized under two general headings, 'magical' and 'abstract'. The latter, better known, are especially found in yogic and high Hindu Tantric sources. . .The former, found in both Buddhist and Hindu sources, are, in spite of having fallen out of vogue among Tantric authors and commentators, nonetheless more original and authentic."
David Gordon White, Kiss of the Yogini: "Tantric Sex" in its South Asian Contexts
"Among the general public, there is a common misconception about Tantra. It is believed that in performing Tantric practices one uses mystic formulas or mantras, invokes spirits and mystic deities and as a result acquires weird powers and uncanny experiences. But this understanding of Tantra is obviously naive, for Tantra has a much wider connotation. It stands for a particular conception of reality and subsequently a particular way of life."
Kamalakar Mishra, Kashmir Saivism: The Central Philosophy of Tantra