answer - God, the God-son, the trinity - all of these concepts come from pagan religions that preceeded them. Those sects also stemmed from sun worshippers and astrologers before them.
all relgion comes from myths and legends and astrologers before them. Period.
There is no reason for your existance. The universe owes us/you nothing. Your life is pure circumstance and coincidence.
Dont like that answer? Then keep looking for the true god of the bible that has hundreds of theological similarities to numerous astrological sects spanning millenia before it was written.
Keep looking for the "god-head" the triune god of Christianity and dont worry about all those other triune gods of other religions who's God-son was sent to earth via a virgin birth on Dec 25 during the winter solstice.
Who's god-son died for 3 days and was resurected - just like the actual sun appears to do between Dec 21 & Dec 24 before "resurrecting" to create longer days.
the god-son who had 12 apostles instead of 12 signs of the zodiac, the god-son who would be with us until the end of the age (Pisces) as we look forward to the next age (aquarius).
Gnostics wrote stories. Sects were formed around these stories and they were embellished. Sects became powerful cults and rulers contended with them.
Pagan Romans adopted the sect of Christianity to unify the empire. Pagan Romans compiled the bible cannon, deciding for themselves what Christians beleve. These books were translated over & over, mistakes made, modifications made. All other writings of the era were burned so that only the new Roman Christianity would flourish. Christianity is a Pagan religion too. A Pagan myth
Sorry.