may wonder what Tantra is? Tantra is a hidden treasure of mystic knowledge.
It is handed down from a guru (master) to a pupil (che-la). Tantra is
whispered from the guru's lips to the pupil's ear. But nowdays every
secret is for sale, even the most hidden things are available to everyone
(you can build an atomic bomb or make heroin by yourself). You may see,
concealed by hundreds of years, the art of Tantra. You may be sure that
every sacred gesture (mudra) or body position is preserved. But for
the reason of utility some colors are not (for example Dharmaraya's
partner should be blue).
So: Om Ah Benza Guru Pema Dakini Sidhi Hung