These biblical guidelines make for a worldview that is sharply distinguishable from the worldviews around us, even where there are overlapping values. We cannot embrace unrestrained secularism; democracy is not God; freedom can be another word for rebellion; the lust for power, as universal as it is, must be viewed with more than a little suspicion. This means that Christian communities honestly seeking to live under the Word of God will inevitably generate cultures that, to say the least, will in some sense counter or confront the values of the dominant culture. But to say the least is not enough. Christians thus shaped by Scripture envision of church that not only counters alternative cultures but also seeks sacrificially to serve the good of others — the city, the nation, common humanity, not least the poor. Salt does not confront; it enhances. Believers must be the best possible citizens (cf. Jeremiah 29:7; cf. also 1 Peter 1:1; James 1:1), and that means that Christians, who are taking their cue (and thus their worldview) from outside the dominant culture, not only shape and form a Christian culture recognizably different from that in which is embedded but also become deeply committed to enhancing the whole.
D.A. Carson, Christ and Culture Revisited, pg. 144