Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? and what communion hath light with darkness?
Be ye not - Greek, 'Become not.'
Unequally yoked - `yoked with one alien in spirit' х heterozugountes (G2086)]. The image is from the symbolical precept, Leviticus 19:19; Deuteronomy 22:10: cf. Deuteronomy 7:3, forbidding marriages with the pagan; also 1 Corinthians 7:39. The believer and unbeliever are utterly heterogeneous. Too close contact with unbelievers in other relations is included (2 Corinthians 6:16; 1 Corinthians 8:10).
Fellowship, х metochee (G3353)] - share, participation.
Righteousness - the state of the believer justified by faith.
Unrighteousness - rather, as elsewhere х anomia (G458), lawlessness], 'iniquity:' the state of the unbeliever, the fruit of unbelief.
Light - of which believers are the children (1 Thessalonians 5:5).