Consciousness is not only the act of perception, it is the stuff of reality. Perception and reality are the same thing. In an analogy, if you compared reality to the words in a written sentence, there would be no nouns, only verbs.
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Characteristics of consciousness
Consciousness is spiritual essence and is indestructible. It has always existed and always will.
Any given unit of consciousness contains the knowledge of the whole. Like holographic film, if you destroyed all but the last, most minuscule portion of consciousness, that tiny speck of consciousness could recreate the entire universe.
Consciousness is continuous. Consciousness cannot be defined any more than you can define yourself, eternity and All-That-Is.