6 This is the one who came by water and blood: Jesus Christ. Not by water only but by water and blood. And the Spirit is the one who testifies, because the Spirit is the truth.
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the Spirit, the water, and the blood—and the three are united in agreement.
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If we receive human testimony, God's testimony is greater, because this is what God testified: he has testified about his Son.
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The one who believes in God's Son has the testimony within; the one who doesn't believe God has made God a liar, because that one has not believed the testimony that God gave about his Son.
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And this is the testimony: God gave eternal life to us, and this life is in his Son.
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The one who has the Son has life. The one who doesn't have God's Son does not have life.