>>10891314All energy is concious. In the same way, all that is concious is energy
Where there is no energy, there no consciousness.
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There was conciousness before there was life, but in a significantly more chaotic format: It could take the form of a supernova, light, fusion of an atom, and even the big bang itself*.
Consciousness arises where there is energy. A photon of light is conscious like you and me, but won't perceive much or be able to comprehend. In contrast a more complex energy system like a brain and body can work together to perceive a more comprehensive picture of the universe. Just as energy can come together, consciousness can come together because energy IS conciousness.
You cannot recall your past forms because memory is a feature of the brain that consciousness is utilising. Memory and thinking are not inherent to conciousness.
Another fun thing to think about is pregnancy: The body is taking energy/consciousness in simpler forms and combining it into a more advanced energy system/consciousness. Hey, maybe you were once the piece of food-energy your mum used to combine with the other you's to make a brain/body.
*regarding the big bang: every possible conciousness experienced this event entirely all together in unison before seperating off.