John 3:3

3 Jesus replied,
I assure you: This is a phrase used only by Jesus to testify to the certainty and importance of His words; in Mt, Mk and Lk it is literally Amen, I say to you, and in Jn it is literally Amen, amen, I say to you.
I assure you: Unless someone is born again,
The same Gk word can mean again or from above (also in v. 7).
c he cannot see the kingdom of God.

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