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First John 5:7 in the King James Version is such a great proof-text for the Trinity. Why is it not found in newer versions?

When you read 1 John 5:7 in the KJV it does seem like a great proof-text for the Trinity. It reads, “For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one.”

Newer versions omit that wording.

So why would Christians omit wording that helps prove the Trinity? (1) Those words are not authentic, and (2) There is plenty of proof for the Trinity without them. We don’t need to use spurious words to authenticate the doctrine.

Scholar F.F. Bruce explained it well in his excellent book History of the Bible in English:

They [the words of 1 John 5:7 as found in the KJV] first appear in the writing of a Spanish Christian leader named Priscillian, who was executed for heresy in A.D. 385. Later they made their way into copies of the Latin text of the Bible. When Erasmus prepared his printed edition of the Greek Testament, he rightly left those words out, but was attacked for this by people who felt that the passage was a valuable proof-text for the doctrine of the Trinity. He replied (rather incautiously) that if he could be shown any Greek manuscript which contained the words, he would include them in his next edition. Unfortunately, a Greek manuscript not more than some twenty years old was produced in which the words appeared: they had been translated into Greek from Latin. Of course, the fact that the only Greek manuscript exhibiting the words belonged to the sixteenth century was in itself an argument against their authenticity, but Erasmus had given his promise, and so in his 1522 edition he included the passage. (Today one or two other very late Greek manuscripts are known to contain the passage; all others omit it.)

[New York: Oxford University Press, 1978 (third edition), pp. 141-2]

Ken Horn