1 Corinthians 5:12–13
12 For what have I to do to judge them also that are without? do not ye judge them that are within? 13 But them that are without God judgeth. Therefore put away from among yourselves that wicked person.
What have I to do to judge them also that are without, literally, what is it to me? But those within the church, they are something to me.
Remember, there are numerous problems in this church. Not only is it a common occurrence that fornication is taking place between members of the church, but the church body itself is also puffed up with pride and appears to be boasting about it.
It does matter how one acts within the church because the church is the temple of God (3:16). Since the church is the temple of God, then it goes without saying that God dwells in the midst of the church when it is assembled, “The Spirit of God dwelleth in you.” (3:16). What is outside of the temple is not our concern, so far as their actions go.
God…judgeth those who are without. Rather than spending our time judging unbelievers, let’s spend more time telling them the good news!
How beautiful are the feet of them that preach the gospel of peace, and bring glad tidings of good things. Romans 10:15.
For the wicked person among yourselves, Paul instructs the church to remove him. Is this to be done today? Perhaps, but carefully.
First, it would be best to make any determination for removal based only on these sins Paul mentions here. Second, I think the church in Corinth is dealing with a genuinely unrepentant brother. One who is living in carnality and just doesn’t care what others think. Third, there would need to be undeniable supporting evidence. And then fourth, who would remove the person? It would probably be best to involve the entire church in the matter. It would need to be an extreme case, in my opinion, for this type of church discipline to happen.
Most brothers in Christ, when spoken to with love and given encouragement to follow Christ will most often turn from their sin, or if not leave the local Body on their own. The first option would be best for everyone involved.