Some scholars use esoteric Buddhism and tantra as virtually interchangeable, generic terms covering distinctive developments all across Buddhist Asia from the third or fourth centuries C.E. onward…
Buddhist Tantra
Some notes on Tantra, by Francesca Fremantle
It is possible to do any kind of spiritual practice—not only Buddhist, but Christian or other kinds of practices—with a Tantric attitude, with the attitude of seeing the sacredness in life, of relating our ordinary everyday experiences to this kind of sacred experience…