I was flummoxed by the thread right away because I don't know what the answer to this question is. I'm not sure that anyone really knows "what" consciousness is, or how to define it in an exact way. David Chalmers, in his very interesting 1997 book
The Conscious Mind, which advances a "property dualism" account of the so-called hard problem of consciousness, begins like this:
"Conscious experience is at once the most familiar thing in the world and the most mysterious. There is nothing we know about more directly than consciousness, but it is far from clear how to reconcile it with everything else we know. Why does it exist? What does it do? How could it possibly arise from lumpy gray matter? We know consciousness far more intimately than we know the rest of the world, but we understand the rest of the world far better than we understand consciousness... The
International Dictionary of Psychology does not even try to give a straightforward characterization:
‘Consciousness: The having of perceptions, thoughts, and feelings; awareness. The term is impossible to define except in terms that are unintelligible without a grasp of what consciousness means. Many fall into the trap of confusing consciousness with self-consciousness--to be conscious it is only necessary to be aware of the external world. Consciousness is a fascinating but elusive phenomenon: it is impossible to specify what it is, what it does, or why it evolved. Nothing worth reading has been written about it’ (Sutherland 1989)
Almost anyone who has thought hard about consciousness will have some sympathy with these sentiments... What is central to consciousness, at least in the most interesting sense, is
experience. But this is not a definition. It is, at best, a clarification. Trying to define conscious experience in terms of more primitive notions is fruitless. One might as well try to define
matter or
space in terms of something more fundamental. The best we can do is give illustrations and characterizations that lie at the same level."
From the standpoint of non-materialist, naturalistic philosophical accounts of consciousness (property dualism and panpsychism, most generally), the most important thing he said in that introduction, as far as the thesis that consciousness is non-physical, is the assertion that it can't be described in more primitive terms. That is: it doesn't reduce to something more fundamental, i.e something physical. That intuition (and it's purely an intuition, not the conclusion of an argument), that the phenomenal
what-it-is-like-ness of awareness can't possible be reducible, is central to non-materialist accounts of consciousness. That intuition is what the "hard problem of consciousness" refers to.
Where does it come from? Does it survive death? Is the universe conscious?
Some of these questions might be difficult because they might conflate certain religious questions about the nature of "soul" or "spirit" with the philosophical question about materialism and consciousness.
For naturalists like Chalmers, in some sense consciousness is a fundamental part of nature. But the entire point of concocting ideas like property dualism or panpsychism is that those philosophers do not advocate for some sort of idealism, as in the idea that
only consciousness is real. They think that the physical universe is real. They are realists in that idealist/realist philosophical paradigm. So consciousness "comes from" the same nature that electrons come from, even though there is something about conscious experience itself which doesn't reduce to descriptions of physical particles. From that naturalistic standpoint, individual consciousness of some entity does not survive death (or at least there is no particular reason to believe that it does under naturalism). Under panpsychism, which conceives of a sort-of reduction of human conscious experience into more primitive "proto-conscious" states that are associated with the physical universe, there is some sense in which the universe is "conscious", albeit it would not be a consciousness exactly like human consciousness.
Obviously from various religious standpoints, consciousness is associated with something like
mind or
psyche distinct from
body such that consciousness survives death because it subsists in that non-physical soul or mind, but it's worth noting that "non-materialist accounts of consciousness" don't necessarily entail consciousness after death.
What counts as consciousness?
If it's difficult to identity exactly what consciousness is, than it would be harder to delineate what counts as consciousness. But broadly, according to the way Chalmers talks about it, and what I think is the most useful description, anything that has a subjective experience of awareness is conscious (that what-it-is-like-to-be-ness), insofar as we can determine that those experiences exist for a given entity. The problem is we do not experience that subjectivity of the other directly, we only infer it from what we can observe: behavior and language mostly. This brings up the interesting philosophical problem of
p-zombies, from the standpoint of naturalistic non-materialist accounts of consciousness.
Are altered states of consciousness "real" in any sense? What is the value of meditative consciousness?
Altered states of consciousness are real in the sense that they are real states of consciousness, but their content may not have an external referent in the world. It's useful to distinguish between the reality of the awareness and the reality of the referents of the contents of a specific awareness.
From a purely naturalistic standpoint, meditative consciousness may be useful because it can help a person to feel more peaceful and happy, reduce stress, or etc. In other words there are reasons to think that meditation may be useful for people in a purely practical way detached from any particular metaphysics or religious ideology. From a religious standpoint, there are many mystical traditions which assert that the ultimate experience and fullfilment of human life is found via meditation or contemplation. That "God" in whatever sense is "hidden in the cave of the heart", i.e in interior experience as a cultivated practice that involves conscious awareness.