1 John 4:3 provides the direct opposite: the spirit that does not confess Jesus is from the antichrist, contrasting with the true confession.

1 John 4:15 echoes the confession of Jesus as Son of God, expanding the same test of spirits from 4:2.

1 John 5:1 echoes the same confession: believing Jesus is the Christ means being born of God, linking confession to divine birth.

1 John 5:20 affirms that the Son of God has come, reinforcing the incarnation confessed in 4:2.

John 1:14 declares 'the Word became flesh' — the exact incarnation that 1 John 4:2 says must be confessed.

1 Corinthians 12:3 affirms that confessing 'Jesus is Lord' requires the Holy Spirit, same Spirit-test as 1 John 4:2.

1 Timothy 3:16 states 'He was manifest in the flesh,' the same central truth of Christ's incarnation that 1 John 4:2 requires to be confessed.

Romans 1:3 affirms Jesus was 'descended from David according to the flesh,' supporting the incarnation that 1 John 4:2 says must be confessed.

Galatians 4:4 affirms Jesus was born of a woman, directly supporting the confession that Christ has come in the flesh.

Hebrews 10:5 directly references Christ coming into the world, affirming the incarnation that 1 John 4:2 requires confessing.

2 John 1:7 repeats the same criterion: confessing Jesus Christ coming in the flesh, directly parallel to 1 John 4:2.

John 16:13-15 shows the Spirit guiding into truth about Christ, which underlies the confession of Jesus in the flesh.

John 12:42 shows believers who knew Jesus but refused to confess Him — the opposite of the confession demanded in 1 John 4:2.

Philippians 2:11 calls for confessing Jesus as Lord, a different but related confession that complements the incarnation.