There is quarantine, the separation of disease, and there is the necessity of moral quarantine of sinful men from society. We do not flee from disease and sin, but rather separate and segregate sin and contagious disease from a community. This tells us what the biblical doctrine of holiness is about.
Too often in the modern versions of the doctrine of holiness, it is the people who are trying to be holy, who quarantine themselves off from everybody else. They segregate themselves and leave the whole of the world to evil. But the Bible says it is disease and contagious men and sinful criminal men who are to be quarantined, who are to be segregated and separated—not the godly.
The earth is the Lord’s and the fullness thereof, the world and they that dwell therein; therefore we are not the ones to be quarantined…
Our Lord prays, not that we should be taken out of the world, but that God should keep us from the Evil One.
Rushdoony, R.J. (n.d.). The Ritual of Cleansing [sermon]. Pocket College. Available http://www.pocketcollege.com/beta/index.php?title=The_Ritual_of_Cleansing_-_RR172N25. Last accessed 27th Jul 2017.