Instead, does a Christian sue a Christian, ¹  and do this before unbelievers?

If an unbeliever invites you to dinner and you want to go, eat whatever is served without asking questions of conscience.

then the master of that slave will come on a day when he does not expect him and at an hour he does not foresee, and will cut him in two, ¹  and assign him a place with the unfaithful. ² 

among whom the god of this age has blinded the minds of those who do not believe ¹  so they would not see the light of the glorious gospel ²  of Christ, ³  who is the image of God.