Does Paul write in 1 Corinthians 7:11-15 about divorce OR separation? The original (Greek) text seems to be here quite clear, but church' interpretation still doesn't see difference:
KJV 1Co 7:11 But and if she depart, let her remain unmarried, or be reconciled to her husband: and let not the husband put away his wife. 1Co 7:12 But to the rest speak I, not the Lord: If any brother hath a wife that believeth not, and she be pleased to dwell with him, let him not put her away. 1Co 7:13 And the woman which hath an husband that believeth not, and if he be pleased to dwell with her, let her not leave him. 1Co 7:14 For the unbelieving husband is sanctified by the wife, and the unbelieving wife is sanctified by the husband: else were your children unclean; but now are they holy. 1Co 7:15 But if the unbelieving depart, let him depart. A brother or a sister is not under bondage in such cases: but God hath called us to peace.
1 Corinthians 7:11-15 uses chorizo / choris (separation), but f.e. 1 Corinthians 7:27 uses lusis (divorce) = the same word Jesus spoke to the Jews about divorce.