Does the physical world have eternal properties? Do you even know what an eternal property must look like?
No, I have no idea what you mean by "eternal property".
Eternal properties means something has the ability to be self-sustaining
What does that mean, exactly?
and the physical world does not have that capability and cannot even be proven to be real outside of a person's conscious existence.
Or so you keep claiming.
To reasonable people however, it comes accross as rather philosophycal masturbation to state that one can't reasonably prove that fire is real and that it is a bad idea to stick your hand in it.
Since the physical world is not eternal and doesn't have eternal qualities, the minds of scientists keep looking to understand what is the beginning of the universe.
...without assuming the answers, yes.
Consciousness has the capability of being an eternal substance
What does that mean, and how do you know?
, as it is conceivably possible that a conscious existence can exist without being destroyed
Again, what does this mean?
As far as I know, consiousness is an emergent property of a
physical brain. I have never witnessed a consiousness that is not emergent from a
physical brain.
, if it exists outside of a physical body.
Again, what is your evidence to support this?
I've never seen a consiousness absent a physical brain....
It's like talking about a type of wood that doesn't come from a tree.
I don't know what that is...
When you dream, you dream you have a body and that you are in a physical world: but does that physical world or body exist? No, so why do you think this one does: outside of consciousness?
A dream is something that takes place between your ears. Why would you assume that it takes place in physical reality?