2 By this the Spirit of God is known: every spirit that acknowledges Jesus Christ as having come in flesh is of God,
1 John 4:2 Cross References - WPNT
John 1:14
14 So the Word became flesh and lived among us, and we observed His glory, glory of an Only-begotten, from the Father, full of grace and truth.
John 16:13-15
13 However, when He, the Spirit of the Truth, has come, He will guide you into all the truth; for He will not speak on His own, but He will speak whatever He hears. He will also communicate to you the things that are coming.
14 He will glorify me because He will take of what is mine and communicate it to you.
15 All that the Father has is mine; that’s why I said that He takes from what is mine and will communicate it to you.
1 Corinthians 12:3
3 Therefore I inform you that no one speaking by God’s Spirit calls Jesus accursed, and no one can declare Jesus to be Lord except by the Holy Spirit.
1 Timothy 3:16
16 Yes, the mystery of our religion is confessedly great: God was manifested in flesh, was vindicated in spirit, was revealed to angels, was proclaimed among nations, was believed in the world, was received up in glory!
1 John 2:23
23 Whoever denies the Son doesn’t have the Father either.
1 John 4:3
3 and every spirit that doesn’t acknowledge Jesus Christ as having come in flesh is not of God; indeed, this is the spirit of the Antichrist, of which you have heard that it is coming—actually, it is already in the world right now.
1 John 5:1
1 Whoever believes that Jesus is the Christ has been begotten by God; also, whoever loves the Begetter should love the one begotten by Him as well.