The Kalacakra Tantra (Kalacakra means "wheel of time") is a tradition of Buddhist theory and practice whose root text treats a fantastic expanse of knowledge ranging from observations of the cosmos to investigations of meditative states and vital bodily energies. In the Tibetan-speaking world, a public Kalacakra initiation remains the most sought-after event in the life of a devout Buddhist. The Fourteenth Dalai Lama has long had a strong...