Paul’s intended trip to Rome, a journey that he purposed to eventually take him to Spain (Rom 15:22-29), had two basic objectives. The first was to enjoy fellowship with the believers in Rome (Rom 1:11-12), and the second was to preach the gospel to those who were in Rome (Rom 1:13, 15).
It is appropriate to distinguish between the secular and the sacred, provided that the territory at which they overlap is recognized. Things which are sacred should not be secularized, but what is secular can and should be made sacred such that the gospel may be advanced through it.
In the church, we have often talked about the same sex marriage controversy and how it poses a threat to both religious liberty and the family unit. However, the elephant in the room that is rarely publicly discussed in evangelical circles is pornography, an evil that arguably poses just as much threat (if not a bigger threat) to the family unit.
The Sirens present a powerful metaphor for the temptation faced by Christians. Like the Sirens, the temptation to fall into sin can be highly enticing and seductive. It may offer you pleasure here and now, but remember that the island is littered with the bones of previous victims.
So many people in our modern evangelical culture assent to a set of propositional truths about God but in their hearts are practical atheists. I believe that Scripture gives us examples of people of this category — people who were doctrinally sound but whose lifestyles did not bear out their professed beliefs.