There was no subject so hotly debated in the early church than the relationship between God , Jesus, and the Holy spirit. Every side in the debate went through the stage of declaring the others Heretics. All were certain there was only one God.
The Trinity concept was numerically the winner.
However virtually all the other concepts still survive to this day in one form or another.
Most people I have met, Trinitarians or not, are quite unable to explain the Trinity in simple terms.
Muslims are unwilling to even try.
However This does not mean the concept is false, it simply means like all religious concepts, it is mysterious.
Terrywoodenpic,
What exactly do you mean by;The EARLY Church???
If you are talking about the church of the first century, NO ONE even dreamed of a trinity. Everyone KNEW that there is only one God, as is mentioned in the Bible several times.
There are numerable scriptures that speak about one God, but just consider several scriptures that say exactly that.
Consider Deut 6:4 which says our God is ONE GOD. The original scripture says Jehovah is one God. The Proper name Jehovah was written in the original scriptures over 7,000 times.
Gal 3:20, says that God is only ONE.
At John 17:3, Jesus himself said that there is only ONE true God, separating himself from God, as he was the one sent forth.
At 1Cor 8:4-6, tells us that there are those CALLED gods, but there is only ONE GOD THE FATHER, to Christians, and ONE Lord, Jesus.
At John 8:16-18, where Jesus is making a point about having to have TWO witnesses to prove something true. Then Jesus said that He was ONE Witness, and the Father was ONE Witness. They had to be separate people for this principle to be true.
Another point; at John 5:22, Jesus said that the Father does not judging at all, but has given all the judging to the son. If they were the same person, Jesus would be lying. Jesus never lied, he never even said things that were deceitful, 1Pet 2:21,22.
Jesus also said that what he taught was not his, but belonged to the one who sent him, John 7:16. God sent Jesus, John 3:16,17.
Jesus said that he LIVES because of the Father, John 6:57. That means that there was a time when Jesus did not live, or exist. We are told that a Father cause the birth of a chile, Prov 23:22.
A very interesting several scriptures are found at Prov 8:22-31, which most Bible schlors believe to be talking about Jesus, here personified as wisdom.