A few days ago I was feeling really chaotic. There was a subconcious panic in me. I prayed to Sri Ramakrishna and slept for fifteen minutes.
I woke up thoroughly refreshed.
My mental chaos was gone.
I had slept deeply.
No dreams, no thoughts.
Only my mind had merged in the dark.
here is what Ramana has to say about Deep Sleep.
In deep sleep mind is merged and not destroyed. That which merges
reappears. It may happen in meditation also. But the mind which is
destroyed cannot reappear. The yogi’s aim must be to destroy it and
not to sink in laya. In the peace of dhyana, laya ensues but it is not
enough. It must be supplemented by other practices for destroying the
mind. Some people have gone into samadhi with a trifling thought
and after a long time awakened in the trail of the same thought. In the
meantime generations have passed away in the world. Such a yogi has
not destroyed his mind. Its destruction is the non-recognition of it as
being apart from the Self. Even now the mind is not. Recognise it. How
can you do it if not in everyday activities. They go on automatically.
Know that the mind promoting them is not real but a phantom
proceeding from the Self. That is how the mind is destroyed."