Exactly.. Born again is a metaphor.. identifing identity..
Meaning do you identify with the flesh or the spirit..
The metamorphosis(evolution) from flesh to spirit.. is metaphorical I think..
Could be "the TEST" of being a human..
Could be we are spirits before we are ever born as humans.. and continue as spirits in the future realm.. The mental test of identity could be important.. How do we "service" this body and the other bodies we are charged with serveing as well.. Because human flesh requires much service.. The test of how we service those in "our kingdoms".. puts our spirits to extreme tests.. How do we husband our service?...
Identity with the flesh or spirit determines worldview..
To God be the glory!