The darkness has lifted a bit today. I've been through quite a few 'dark nights' lately, they are not at all pleasant, but I seem to be getting a bit better at managing them now. The 'dark night of the soul' is apparently a common occurrence with spiritual practice, especially in the modern age.
The advice given to me by a good teacher (which works for me). Is to avoid thinking during the dark night. Don't pay attention to thoughts, disengage from them. Get away from words and language. The dark night is not something you can think your way out of. It is a time to practise stillness and samhadi. This stillness can be a refuge for the mind during dark times, and also if one enters samhadi it acts as protection against Mara.
I like the simile of the dark night being a bit like withdrawing into the inner cave. Going back into the womb, or entering a cocoon. One is going through a process of metamorphosis, of becoming, rebirth, and transformation.
The mind is changing at a deep level, and it can feel uncomfortable and unsettling. It is a process that for some of us needs to be endured. The deeper mind is rewiring itself with important new information it has learned, and the process can't be hurried. The length of time this can take is different for each of us. So one has to be patient.
At this stage in the spiritual journey the mind doesn't need to think or reflect on anything. It's best to keep thoughts herded in and centred with a meditation object. The breath is a good choice as it doesn't need words to pay attention to it. Experience the sense of the body from within. Whatever that subjective experience is for you. For me it feels like an inner ocean contained within a bag of skin, bones a coral reef, the breath like waves. The sea growing calmer as the mind gets stiller. Till the breath seems to stop altogether.
Any thoughts not to do with the meditation object should be brushed aside like useless rubbish, don't get involved with them, no matter how persuasive they seem to be. Stay centred with the body and the breath.
This is a process of purification. Not an intellectual matter.
I like the Buddha's simile of a broken gong that doesn't ring when struck. Sense impressions, thoughts and feelings hit the sense bases, but they don't reverberate in the mind. Everything stops at the point of sense contact before it becomes a story.
It may take multiple sittings to get some serenity and composure back. Don't be discouraged by this. After each sitting notice if the mind at least feels a bit better than it did before, if it does then feel encouraged that you are on the right track and are making progress. Keep the momentum going. It will grow stronger.
Eventually, when it is finished, the mind will emerge from the cocoon and will feel freer than it did before, and the skills one has been developing will seem sharper. Things that confused one will make more sense. And one becomes more aware of the inner workings of the mind; as some of what was previously hidden will now be illuminated.