It isn't until about mid-way through the book in Chapter 6—The Pattern of This Age—that Boice gets into the meat of the topic of his book and the reason I checked out this book to begin with. He digs deep into Romans 12:2, which states, "Do not conform any longer to the pattern of this world," and uses it as a catalyst to define "worldliness" and "secularism," as well as several other "isms".
His examination of Romans 12:2 continues into Chapter 7—This Mindless Age—as he makes very compelling arguments about the decline of Western culture—specifically American culture—and how we've gotten accustomed to letting others do our thinking for us. While many people fear a 1984-style Big Brother watching our every move and restricting the consumption of information kind of oppression, we've careless fallen into the Brave New World state in which passivity and egoism are the true threats to our ability to think for ourselves. With such mindless creatures who believe without questioning, there is no need for a Big Brother type figure to keep us in line. We're as passive as possible.
Boice's underlying message seems to be that the central force that drives our mindless acceptance of societal truisms is television media. This makes perfect sense given our addiction to hand-fed entertainment and media-bent news and events.
At this point, Boice offers an almost formulaic approach to continual mind-renewal that keeps one grounded in the base truths that our faith offers.
eBook Renewing Your Mind in a Mindless World