The doctrine of the Trinity is an important biblical doctrine and there are a lot of scriptures
that teach it, but the clearest, best verse to teach the Trinity is 1 John 5.7. The Bible
reads, For there are three that bear record in heaven, the Father, the Word, and the Holy
Ghost, and these three are one. So here we have the Father, the Word, and the Holy Ghost,
and then that important phrase, these three are one. That's where we get the word Trinity,
three in one. Now there are other places we could go to show the Father, the Son, and
the Holy Ghost that they are three in one, but this is the clearest, this is the best
verse that just flat out declares that to be the case. Listen to 1 John 5.7 in the NIV.
The NIV says, For there are three that testify. Period. That's the end of the verse. And then
in verse 8 it says, The Spirit, the Water, and the Blood, and the three are in agreement.
So verse 7 is virtually removed. Instead of saying, like the King James, For there are
three that bear record in heaven, the Father, the Word, and the Holy Ghost, and these three
are one, it's been reduced down to just there are three that testify.