John Stott offers a reminder of the task and the tension we, as Christians, must continually navigate when he uses the phrase:

“spiritually distinct, but NOT socially segregated.”

And here is a quote expanding this perspective:

Your business and mine as Christian people is to be in the midst of this world and its affairs, and still remain true and loyal to God, and be kept from evil.  …The task of the Christian is to be right in the midst of this world and its affairs in order that he may do the work of evangelism, spreading the gospel and the Kingdom of God, while the whole time, keeping himself un-spotted from the world.

~Martyn Lloyd-Jones, from Safe in the World