Dark Night of the Soul
Dark nights is something we talk in our sangha a lot. Our teachers and instructors speak about this in regular basis because one of the problems out there is that people are taught practices of various types but they are not told about how rough practice can be, i.e. the dark night phenomena, and so they get into trouble, scared, overwhelmed and so on. Rough periods in practice are actually a good sign and a sign that the practice works but when people don't know this and they don't know what to do and what not to do, they usually draw mistaken conclusions. They think that there is something wrong with them, with the practice, with the teacher and so on, some even quit practicing because they get so scared.
However, the real reason for dark nights is one's own subconscious mind and the core meaning of the practice is to illuminate the subconscious. What is under the lid is being purposefully shed light on and stirred with different practices so that this material can then be used as fuel for insight/vipashyana practice.
It should be understood that actually doing this is not a fun ride but... doing this correctly leads to freedom and happiness that does not depend on circumstances. This is the only way to know ourselves as fully aware and awakened beings, as buddhas, as christs... What practitioners should learn is their limits. This is very important. They should know what they are doing and how much they can do without getting overwhelmed.
In tantra, we use guru yoga to keep things balanced as the presence of the guru brings calm and clarity, and doesn't stir things. During dark nights, we have the instruction not to practice wrathful deities because if you do, they keep stirring up the subconscious and bringing more stuff to the surface. How much one can take and use for insight practice depends on the individual. Those who are ready and understand how the practice works can take big leaps very fast. Those who aren't that ready or don't have a clear view have hard time making sense of it all and practice feels like a burden. Regardless of which type of a practitioner one is, there should be instructions how to go about it.
As a general note that I have said over and over again, there are great differences between sutris and tantric methods. It seems to be the case that those who practice sutric forms end up with problems like insomnia, psychosis, digestive and typical dark night emotions like anxiety and depression much more often than those who practice tantra. Tantric retreats also have much more natural expression in the form of chanting, singing, dancing, talking and socialising than quietive systems where you are to keep your gaze low, not talk and socialise and just do a lot of silent sitting. I think that unless one is very advanced in practice and insight, you shouldn't do quiet retreats that contain a lot of silent sitting because this is not a normal situation.
Kim, 25.5.2021