Myth:
an invented story, idea or concept - an imaginary or fictitious thing or person - (Oxford dictionary)
Mind is the mother imagination – imagination is the mother of myths.
Myths are sustained by belief.
The lifespan of myths depends on the faith of their beholders.
In order to survive, myths devise supporting myths, or update their terminologies. Thus (for example) genesis turns into genetics, god into big bang and Homo into Sapiens, who covers the manipulations with evolution myths.
(Apropos: survival concepts are myths too.)
Most religious- moral- social- political- economical and historical myths are to bind collectives - yet, there are also plenty of myths concerning mind and body, and probably more about Life & Death.
“We are living in a world of make-believe, trying not to let it show…” (Moody Blues)