what does the bible say?
First, what does "testify" (or witness) mean in 1 John 5:7-8? In the context of 1 John, the testimony refers to the witness of God concerning His Son, Jesus Christ. Verse 7 simply emphasizes John's claim that there is evidence proving Jesus is the Son of God. In verse 6, these were defined as the water, the blood, and the witness of the Spirit. The water and blood refers to God's voice at Jesus' baptism, His crucifixion and resurrection. Verse 8 repeats the identities of the three who testify, and emphasizes their agreement. Verse 9 points out that the testimony of God is greater than that of men, establishing that Jesus is the Son of God.
A disputed clause, called Comma, was inserted between verses 7 and 8 in some later versions of 1 John. Both versions of 1 John 5:7-8 are shown below. The long version includes the disputed Comma.