This concept of the Room is in some respects analogous to that of the Sphere, a movie by that name, if memory serves. The Sphere would bring to life whatever was at the center of your true consciousness; in some cases, this was not something pleasant, and resulted in at least one death, as I recall, and substantial danger for more.
I have often argued that Goodness consists in knowledge, and that growth consists in gradually eradicating from the movement of your personality all of the things that you normally would feel the need–on some level–to hide. This hiding can be from your conscious mind, or from others.
One of the roles presumably played by cults of evil–Satanic cults, examples of which would include for my purposes all cults including ritual torture and murder, as for example the Aztecs and headhunters–is externalizing unpleasant thoughts and sharing them with others, such that the need to hide one’s rage disappears. You can accept it in yourself, since you see it accepted by others. This does not make this a functional adaption, but it erodes the isolation that hate builds. Even Sade found it desirable, in his “300 days of Sodom”, to create a core group of four Satanists, who committed their crimes, in large measure, together.
The Room, then, if it grants you your heart’s innermost wish, acts as a mirror to tell you who you are. What comes out is who you really are. Most people do not want to know who they really are.
A Good person, however, has lit all his rooms. Water swirls about, but it is clear, so what is on the surface is congruent and indistinguishable from what is deeply beneath the surface. A good person is transparent.
Yet, what does this clarity grant you? The ability to see more deeply into the universe. You are no longer in your own way. Thus, in Goodness there is more latent complexity and order than in evil, which consists mainly in many dark, decaying rooms, none of which communicate in an honest ways with the others. Loneliness can be diminished in shared crimes–and through the connection with the victim through violence–but never released. True tranquillity is never possible.