²¹ when you heard about Christ and were taught in him in accordance with the truth that is in Jesus.

²⁰ We know also that the Son of God has come^(A) and has given us understanding,^(B) so that we may know him who is true.^(C) And we are in him who is true by being in his Son Jesus Christ. He is the true God and eternal life.^(D)

¹³ And you also were included in Christ^(A) when you heard the message of truth,^(B) the gospel of your salvation. When you believed, you were marked in him with a seal,^(C) the promised Holy Spirit,^(D)

Warning Against Unbelief

⁷ So, as the Holy Spirit says:^(A)

¹⁰ Whoever believes in the Son of God accepts this testimony.^(A) Whoever does not believe God has made him out to be a liar,^(B) because they have not believed the testimony God has given about his Son. ¹¹ And this is the testimony: God has given us eternal life,^(C) and this life is in his Son.^{(D) 12} Whoever has the Son has life; whoever does not have the Son of God does not have life.^(E)

⁷ rooted^(A) and built up in him, strengthened in the faith as you were taught,^(B) and overflowing with thankfulness.

¹⁷ the Spirit of truth.^(A) The world cannot accept him,^(B) because it neither sees him nor knows him. But you know him, for he lives with you and will be^[a] in you.

¹⁰ As surely as the truth of Christ is in me,^(A) nobody in the regions of Achaia^(B) will stop this boasting^(C) of mine.

²⁰ For no matter how many promises^(A) God has made, they are “Yes” in Christ. And so through him the “Amen”^(B) is spoken by us to the glory of God.^(C)