Do not be unequally yoked with unbelievers. For what partnership has righteousness with lawlessness? Or what fellowship has light with darkness? 15 What accord has Christ with Belial? Or what portion does a believer share with an unbeliever? 16 What agreement has the temple of God with idols? For we are the temple of the living God; as God said,
“I will make my dwelling among them and walk among them,
and I will be their God,
and they shall be my people.
17 Therefore go out from their midst,
and be separate from them, says the Lord,
and touch no unclean thing;
then I will welcome you,
18 and I will be a father to you,
and you shall be sons and daughters to me,
says the Lord Almighty.”
Since we have these promises, beloved, let us cleanse ourselves from every defilement of body and spirit, bringing holiness to completion in the fear of God. ESVUK
There was a time, not too many years ago, when it was not uncommon for preachers to spell out in detail, for their congregations, what it would mean to ”be separate”. By and large the message was negative: ‘You are not permitted to do this, that or the other.’ However sincere the intentions may have been, it resulted in legalism: adding man-made rules to the law of God – a kind of modern day Pharisaism maybe.
To be clear, there are injunctions and prohibitions in the New Testament (as well as the old). Christians are definitely exhorted to do certain things and not to do others. So, in order to bring ”holiness to completion in the fear of God” we do need to be immersed in the Scriptures. But it seems to me that, for those who are soaked in the Word of God, there will be an on-going task of Spirit-filled discernment to try to understand what will defile ”body and spirit”. What are the ”unclean” things we are not to ”touch”? From what do we need to ”be separate”?
I believe need to understand that because there are ‘secondary’ and ‘tertiary’ matters, as well as those of primary importance, different Christians may hold differing opinions on certain subjects. In ‘disputable matters’ we must charitably allow fellow-believers to hold viewpoints other than our own. “In essentials, unity; in non-essentials, liberty; in all things, charity,” is an aphorism variously attributed to St. Augustine of Hippo (354 – 430), John Wesley (1703 – 1791), and to a number of theologians in between them. It remains an important principle for us to observe.