Again
1¶And after six days Jesus taketh Peter, James, and John his brother, and bringeth them up into an high mountain apart,
2And was transfigured before them: and his face did shine as the sun, and his raiment was white as the light.
3And, behold, there APPEARED unto them Moses and Elias TALKING with HIM .
Where does it say the Apostles knew? Not till the next verses...
5 And Peter answered and said to Jesus, Master, it is good for us to be here: and let us make three tabernacles; one for thee, and one for Moses, and one for Elias.
First of all, why three tabernacles when they are disciples of Jesus His Pre-Eminence?
Second of all how did they know who they were?
you still refuse to answer and its clear because you don't have an answer.
However, the Apostles knew that Moses had died. And they knew that Enoch did not die. And they also knew that Moses was not buried. They knew that both of them had come from heaven. Heaven is not a ghost world i hope you know. Thus, they were able to tell it was Moses and Elijah. And no man can enter heaven except he is born again.
And being born again is putting on your immortal body in life alive, and that is really what it means to be saved. Salvation, is to be saved from the physical death so that you don't have to go to hell and await resurrection. That is what it means to be saved.
Compare this:
3 Enter ye in at the strait gate: for wide is the gate, and broad is the way, that leadeth to destruction, and many there be which go in thereat:
14 Because strait is the gate, and narrow is the way, which leadeth unto life, and few there be that find it.
The few that found it are Enoch and Elijah.