1 John 4:2

4:2 By this you know the Spirit of God: Every spirit that confesses Jesus as the Christ who has come in the flesh is from God,

1 John 4:14-15

4:14 And we have seen and testify that the Father has sent the Son to be the Savior of the world.

4:15 If anyone confesses that Jesus is the Son of God, God resides in him and he in God.