One of the more common accusations I hear about modern translations is that they omit the Trinity. The facts behind the accusation is that the Greek manuscripts used by modern translations unanimously recognize that 1 John 5:7b–8a was added centuries after John wrote his epistle and so these words are relegated to the footnotes. This passage is called the Comma Johanneum. The words in italics below are the added words.
For an Informed Love of God