1 John 5:5-8

Who is the one who is victorious and overcomes the world? It is the one who believes and recognizes the fact that Jesus is the Son of God. This is He who came through water and blood [His baptism and death], Jesus Christ—not by the water only, but by the water and the blood. It is the [Holy] Spirit who testifies, because the Spirit is the truth. [He is the essence and origin of truth itself.] For there are three witnesses: the Spirit and the water and the blood; and these three are in agreement [their testimony is perfectly consistent].