The Great Perfection, also known as the Atiyoga or Dzogchen (rDzogs chen), is both a name for the realization of instantaneous enlightenment and a name for the literature that talks about this. Generally speaking, the Great Perfection is beyond both words and deeds, yet even though nothing may be said about it, there does exist a large body of literature that discusses it. This literature exists today within the canons of teachings that are preserved...