I can rigorously define consciousness. I am not so sure about religion. That is really a transmission of traditions that assist or attempt to assist the individual to communicate with his consciousness and understand his present role.
Consciousness is an aspect of yourself tasked with supporting your physical third tier body. You may be simultaneously supporting many physical bodied at the same time although that is not necessary. It just seems best practice and likely.
Consciousness is itself formed as a second tier natural logic machine that is perpetual and will not die. It can best be thought of as an aspect of the meme GOD which may well be no greater than its parts and remain indescribable. It may also be unnecessary as a natural choice and sharing meme can likely fulfill any imagined role.
A more useful concept can be that a first 'logic machine formed and then calved in order to experience itself and continued to calve as the universe expanded. Obviously then a light body logic machine reaches a critical mass allowing self consciousness and that is its natural limit in terms of number.
So while we have the concept of GOD, the reality is a shared consciousness covering the whole universe. .
Why doesn’t it all go on in the dark, without any awareness? Why do we have any inner life at all?