Where can harmony between Christ and Belial be found? Or what participation has a believer with an unbeliever?

For I fear, lest by any means, when I come, I should find you not such as I would, and should myself be found of you such as ye would not; lest by any means there should be'strife, jealousy, wraths, factions, backbitings, whisperings, swellings, tumults;