The one true God is the trinity that is why we Catholics preach in the name of father, son and holyspirit thought us in our catechism.
And the trinity is Adam and eve and God the father , Jesus and holyspirit(Mary magdelen) and God the father. They are the begining and the end of the bible book from genesis to revealation. They began the Bible book and it's them that will appear again in the ending of bible book in revealation called the end time the author and finisher of the fate of humanity themselves.
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From @adycelia