Jamieson, Fausset and Brown on 1 Corinthians 6:1

CHAPTER 6

1Co 6:1-11. Litigation of Christians in Heathen Courts Censured: Its Very Existence Betrays a Wrong Spirit: Better to Bear Wrong Now, and Hereafter the Doers of Wrong Shall Be Shut Out of Heaven.

1. Dare--This word implies treason against Christian brotherhood [Bengel].

before the unjust--The Gentile judges are here so termed by an epithet appropriate to the subject in question, namely, one concerning justice. Though all Gentiles were not altogether unjust, yet in the highest view of justice which has regard to God as the Supreme Judge, they are so: Christians, on the other hand, as regarding God as the only Fountain of justice, should not expect justice from them.

before ... saints--The Jews abroad were permitted to refer their disputes to Jewish arbitrators [Josephus, Antiquities, 14.10,17]. So the Christians were allowed to have Christian arbitrators.