We do not have to be of the world to witness to the world
1 Corinthians 5: 9–11
“I have written you not to associate with the sexually immoral, not at all meaning the people of this world who are immoral, the greedy the swindlers or idolaters. In that case you would have to leave this world then who would carry out the great commission?”
Paul makes it clear that we must not disassociate ourselves from unbelievers, otherwise how could we carry out our SAVIOURs command to tell them about Salvation bought on the CROSS, Matt28:18. But we are to distantance ourselves from those who are claiming CHRIST but are not HIS. These people using the mechanism our world opperates on, rationalize away their sins as its acceptable to society. While their actions may be condoned by this world they are not acceptable in GODs eyes, & HIS eyes are the only ones that matter. Our actions & our character is what we have to show this world of a changed life, & CHRIST commands us to go out into the world telling the GOOD NEWS of eternal life thru HIM. Act now dont wait.