Matthew Poole and continuators on 2 Corinthians 6:15

15 And what concord hath Christ with Belial ? or what part hath he that believeth with an infidel ?

By Belial in this Text, very good Interpreters understand the Devil; judging that the Apostle here opposeth Christ, who is the Head of Believers, and of the Church, to him who is the Head of all Vnbelievers, and the God of the World. The term is used only in this place in the New Testament, but very often in the Old Testament, to express men notoriously wicked and scandalous, Deut. 13.13. Iudg. 19.22. 1 Sam. 1.16▪ & 2.12. & 25.17. 2 Sam. 16.7. 2 Chron. 13.7. The Hebrews themselves are not agreed in the Etymology of it; Psal. 101.3. a wicked thing is called a thing of Belial (as may be seen in the Margents of our Bibles) so as the Argument is drawn from our duty of Conformity to our Head; Christ hath no fellowship with the Devil, therefore we ought to have no unnecessary communion with such who manifest themselves to be of their Father the Devil, by their doing his works; nor hath Christ any communion with the Sons of Belial.

What part or portion, that is, what society or communion hath a Believer with one that believeth not? What hath he to do with him? It was an usual Phrase amongst the Jews, Iosh. 22.25.27. Some by this part understand, what portion in the life to come: in which sense it teacheth us, that we should maintain intimate and elective communion in this life only with such, as we would gladly have our portion with in another life. But the most judicious Interpreters think this is not intended in this place.