God gave us a Bible. And in that Bible in John 1: 1 it says that God is 3 she’s the word he’s with the words and he is the word. I don’t see where you get man-made Doctrine. There’s plenty of other examples in the Bible that everything is in threes. Try reading 1st John. God gave us the ability to read and comprehend what we’re reading. It’s not man-made.