For those who are familiar with the concept of Akashic records, the "Abyss of the Consciousness" a lot of sense. The Akashic Records are records of every soul's journey, from the time it first individuates from Source until it finally returns home-a journey that can take millennia. No matter how new or ancient a soul you are, your Akashic Record holds all your thoughts, feelings, actions, and deeds from each lifetime. It is believed that natural quartz crystals help you access this library of all consciousnesses, past, present and future.
This metaphysical concept is explored in the TV series in a simplified approach, to make the narrative thread easier to follow. It is embedded with another topic: the search of immortality.
There is no connection with Fringe, as some users suggested. Fringe is about parallel universes, while Dream Raiders is more about the expansion of consciousness beyond the limits of matter.