1 Corinthians 1:8–9

Paul reminds the Corinthians that God, who called them, is faithful

8who will also confirm you to the end, blameless on the day of our Lord Jesus the Messiah.

9God is faithful, through whom you were called into fellowship with his Son Jesus the Messiah, our Lord.

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In its context

6just as the testimony of the Messiah was confirmed among you,

7so that you do not lack in any gift, as you wait for the revelation of our Lord Jesus the Messiah;

…

10Now I urge you, brothers, by the name of our Lord Jesus the Messiah, that all of you say the same thing, and that there be no divisions among you, but that you be perfectly united in the same mind and in the same judgment.

11For it has been made clear to me about you, my brothers, by those of Chloe that there are quarrels among you.

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Its words in the original

Faithfulness