We can begin with the realm of hell, which is the most intense. First there is a build-up of energies, of emotions, to a crescendo, so that at some stage we find it very confusing whether the energies are controlling us or we are controlling them. Then suddenly we lose track of this whole race, and our mind is put into a blank state which is the luminosity. From that blank state an intense temptation to fight begins to develop, and that paranoia also brings terror. Originally the paranoia and terror were supposed to fight against something, but one is not quite certain whom exactly one is fighting; and when the whole thing has developed, the terror begins to turn against oneself. When one tries to strike out, instead of fighting the projection one is striking inward.
It is like the story of the hermit who saw a leg of lamb in front of him, and wanted to pick it up and cook it. His teacher told him to mark it with a cross, then later he discovered that the cross was marked on his own chest. It is that kind of notion; you think there is something outside to attack or fight or win over. In most cases hatred is like that. You are angry with something and try to destroy it, but at the same time the process becomes self-destructive, it turns inward and you would like to run away from it; but then it seems too late, you are the anger itself, so there is nowhere to run away. You are haunting yourself constantly, and that is the development of hell.
– Chogyam Trungpa (1975, p 5-6)
Cosmic Flotsam 