The belief that there is a Holy Trinity, that encompasses God, Jesus and the Holy Spirit as one single being is NOT in the Bible. This is a false teaching.
Read John in any version you wish ( I use the King James Version). Through out John Jesus himself repeatedly describes himself as the SON of God, as NOT God, and that God uses the Holy Spirit. He states he is NOT God, but rather his Son. That everything he does he does because his father lets him do it. He says it in NUMEROUS passages in John, in his own words.
Wrong. The Bible does support, and say, there is a Holy Trinity. You need to read the whole Bible. But then the book of John, contrary to your statement, supports the Holy Trinity. Try again.
I read the New Testament regularly I have yet to find this doctrine of the trinity as defined in the creeds of nicea, or anthanasia. That you filter John through.
Christians who believe in the Doctrine of the Trinity cite 1 John 5:7 as it appears in some – but not all - versions of the Bible. Here are several Biblical interpretations which tend to support the doctrine:
“7. For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost:
and these three are one. 8. And there are three that bear witness in earth, the Spirit, and the water, and the blood: and these three agree in one” (KJV, emphasis my own).
“7. So there are three witnesses in heaven: the Father, the Word and the Holy Spirit,
and these three are One; 8. and there are three witnesses on the earth: the Spirit, the water, and the blood; and these three agree [are in unison; their testimony coincides]” (Amplified Bible, emphasis my own).
However, other versions of the Bible eliminate that part of verse 7 which says “these three are one” thus changing the entire meaning of the Passage. Here are just a few examples:
“7. There are three witnesses: 8. the Spirit, the water, and the blood; and all three give the same testimony” (Good News Translation).
“7. So there are three witnesses that tell us about Jesus: 8. the Spirit, the water, and the blood. These three witnesses agree” (Easy-to-Read Version).
“7. For there are three that testify: 8. the Spirit, the water and the blood; and the three are in agreement” (NIV).
“7. So we have these three witnesses— 8. the Spirit, the water, and the blood—and all three agree” (New Living Translation).
“7. For there are three that testify: 8. the Spirit and the water and the blood; and the three are in agreement” (New American Standard Bible).
Christians may disagree on what the Bible says; however, they totally believe in the Bible as they interpret it. It is undeniable that there is a verse in the KJV which, if taken literally, supports the concept of the Divine Trinity. Now, if the verse is taken in context of the entire Bible, I don't believe it establishes that the Father, Son and Holy Ghost are one, or even equal in any way. However, that is my personal belief and others will have a different opinion. When it comes to the Bible, opinions are clouded by (some would say illuminated by) that passionate and dominating thing called faith.