Tantra is a religious tradition that is found across the whole sweep of the Indian, religious landscape. Tantric Buddhism shares a lot of important concepts, symbols and ritual practices with its tantric counterparts in other Indian traditions. As is true with earlier movements like the Mahayana, Tantric Buddhism produced an extraordinary transformation in Buddhist values. The first question that we might ask ourselves about Tantra is WHAT IS ITS FUNDAMENTAL PRINCIPLE! We can answer that question in detail by looking at Tantra itself.