Emptiness is like a completely clear infinitely vast prism crystal. Our mind is like a light that illuminates inside the prism (everything is inside emptiness, our mind and emptiness are inseparable). Karma is like filters within the crystal that refract different appearances within the crystal. The filters are inseparable from the crystal itself, like internal facets of a diamond created by mental action. The appearances refracted are nothing more than projections of mind inside the cyrstal. Contaminated karma will refract contaminated appearances. Pure karma will refract pure appearances. In truth, these are merely projections of mind filtered through our karma in the prism crystal of emptiness – mere appearnces.

Contaminated appearances appear to exist from their own side independent of the mind. Grasping at those appearances as things that actually exist from their own side is ignorance. These are the things we normally see. Even though they appear vividly, such things do not actually exist at all.

Different mental actions create different karmic filters that refract different appearances within emptiness when that karma ripens. The mental action of believing our correct imagination that we are Heruka creates a particular karmic filter that, when it later ripens, will refract as an appearance of ourself as Heruka in Keajra. But in reality, we are always just the completely clear crystal (only emptiness) refracting ourself as Heruka.

What others see when they look at us as Heruka depends upon the karmic filter they are looking at us through. Take VGL for example. Some may see a cute little Tibetan dude, some may see Guru Sumati Buddha Heruka, others may see Definitive Heruka. VGL can see all of the different ways he is seen (including how he sees himself) because these are all arising within his light-like mind of great bliss inseparable from the infinite prism crystal of emptiness. What is he really? He is no one of these appearances, but from another perspective they are all his emanations appearing to different beings according to their different karma.

When we change our mental actions, we change our karma, which changes the filters inside emptiness, which will change what later refractively appears directly to us.

The Ganden Oral Lineage contains special mental actions that, when engaged in, produce the appearances of enlightenment very very swiftly. One of the most important mental actions within the Ganden Oral Lineage is the meditation on non-dual appearance and emptiness of ourself as Heruka (or Vajrayogini). Another is the meditation on non-dual appearance and emptiness of ourself as the nada in the meditation on the indestructible wind and mind. Others include the appearances of the eight dissolutions, up to meaning clear light, the illusory body, and the union of the two. Believing correct imaginations on each of these functions to create special pure karma that will later ripen as us perceiving ourself as these pure appearances, inseparable from emptiness.

When we perceive directly pure appearance and emptiness as non-dual, we will have attained enlightenment.