Discovery Box1 Corinthians 7:12-14 
Context7:12 To the rest I say – I, not the Lord 1 – if a brother has a wife who is not a believer and she is happy to live with him, he should not divorce her. 7:13 And if a woman has a husband who is not a believer and he is happy to live with her, she should not divorce him. 7:14 For the unbelieving husband is sanctified because of the wife, and the unbelieving wife because of her husband. 2 Otherwise your children are unclean, but now they are holy.
1 Corinthians 7:20
Context7:20 Let each one remain in that situation in life 3 in which he was called.
1 sn I, not the Lord. Here and in v. 10 Paul distinguishes between his own apostolic instruction and Jesus’ teaching during his earthly ministry. In vv. 12-16, Paul deals with a situation about which the Lord gave no instruction in his earthly ministry.
2 tc Grk “the brother.” Later witnesses (א2 D2 Ï) have ἀνδρί (andri, “husband”) here, apparently in conscious emulation of the earlier mention of ἀνήρ (ajnhr) in the verse. However, the earliest and best witnesses (Ì46 א* A B C D* F G P Ψ 33 1739 al co) are decisively in favor of ἀδελφῷ (adelfw, “brother”), a word that because of the close association with “wife” here may have seemed inappropriate to many scribes. It is also for reasons of English style that “her husband” is used in the translation.
3 tn Grk “in the calling.” “Calling” in Paul is God’s work of drawing people to faith in Christ. As in 1:26, calling here stands by metonymy for a person’s circumstances when he becomes a Christian.
