There are about 35,000 different Christian sects and no two of them believe
the same way.
If you are a Christian don't even bother to look at what is called the Old Testament
because Jesus said:
"Therefore all things whatsoever you would that men should do to you, do
you even so to them: for this is the law and the prophets" - Matthew 7:12.
This is the Golden Rule which is recognized by many people way beyond just
Christians - including atheists and it includes the entire Old Testament plus
many more books that Christians don't even recognize.
The "Holy Trinity" is nowhere in the bible. In fact, Jesus
also said "...nor will people say, 'Here it is,' or 'There it is,' because
the kingdom of God is within you" - Luke 17:21.
This is exactly the same as taught by many Eastern religions and it is as
true today as when Jesus spoke those words. So quit looking for God 'out
there' someplace because if the kingdom of God is within you, So if the
God's kingdom is within you, where do you think that God is at?
You and everyone else on the Planet is an eternal spirit. You've been
here before and you'll be back again.