On the theme of living within the culture of our world but also not being subsumed by that culture, two posts of recent days are worth a read:
Tim Keller, speaking to British parliamentarians, here. Tim's major point is that post-Christian culture is much, much more Christian than most post-Christians realise. In explaining the difference Christians made to ancient Rome/Greek "shame-honour" culture, he offers insight into how we might make a difference today.
Ian Paul, writing about women speaking/being silent in church, here, makes a great point about a so-called "historic" reading of Scripture (in this case 1 Timothy 2). It may not be an historic reading. It may, in fact, be a modern, innovative reading, driven by a cultural bias in the way we think Christians ought to live today. If we do not actually want to read 1 Timothy 2 in an "historic"manner (and Ian gives some citations from that reading which, surely, no reader here would want to subscribe to), in what manner will we read it so that we are "in the world but not of the world"?