The Trinity is the low hanging fruit of Evangelical doctrine. The Bible never even mentions this concept. Those Evangelicals who are familiar with the Bible will say,“it isn’t stated but it is inferred”. Their claim is that this is an essential doctrine despite the fact that God in His perfect Word which is the source of all truth failed to state it. (see chapter 2)
The belief in this sort of hidden truth is called Gnosticism. Those who proclaim the truth of the Trinity will also insist that Gnosticism is a great heretical evil.
My first question to those defending the Trinity is, “why only three?” While the Trinity eluded Christians for over three centuries some did believe in multiple gods, as many as seventeen. God is referred to by multiple names:
Elohim (God)
Yahweh (Lord, Jehovah)
El Elyon (The Most High God)
Adonai (Lord, Master)
El Shaddai (Lord God Almighty)
El Olam (The Everlasting God)
Jehovah Jireh (The Lord Will Provide)
Jehovah Rapha (The Lord Who Heals You)
Jehovah Nissi (The Lord Is My Banner)
El Qanna (Jealous God)
Jehovah Mekoddishkem (The Lord Who Sanctifies You)
Jehovah Shalom (The Lord Is Peace)
Jehovah Sabaoth (The Lord of Hosts)
Jehovah Raah (The Lord Is My Shepherd)
Jehovah Tsidkenu (The Lord Our Righteousness)
Jehovah Shammah (The Lord Is There)
Add in Jesus and the different terms used for the Holy Spirit and we have at least 19 names squeezed into three slots. Three was widely considered a special holy number among pre-Christian pagans.
Jesus Himself DENIES the Trinity in Mark:
“Which commandment is the most important of all?” Jesus answered, “Themost important is, 'Hear, O Israel: The Lord our God, the Lord is one.”
The concept of the Trinity is an offshoot of the dual nature of Christ.If Jesus was God then his death was meaningless because God can’t die. If a man then his death was real, so when did He become God? In325 the Council of Nicaea papered over this difficulty with the meaningless, “Jesus is wholly God and wholly human.” Having gone this far the connection between God and Jesus was that they were both equally God but separate. Later in the fourth century the Holy Spirit was added as a junior god and some time after that the doctrine of the Trinity was finally recognized as eternal and essential truth.
Basically then, after four centuries of failing to find this in the Bible someguy proposed this and most Christians have pretended that it is inthe Bible ever since, albeit requiring a Gnostic reading.