This is spot on, as is.
Historically, Christians faced the issue of whether to speak and think in the language of their anti-Christian rulers. If they refused to accommodate, they were accepting utter marginality, and cutting themselves off from any participation in a thriving society. Yet accepting the dominant language and culture accelerated the already strong tendency to assimilate to the ruling culture, even if the process took generations. Although a comparable linguistic gulf does not separate modern Western churches from the secular world, Christians still face the dilemma of speaking the languages of power, of presenting their ideas in the conceptual framework of modern physics and biology, of social and behavioral science. To take one example, when churches view sin as dysfunction, an issue for therapy rather than prayer, Christians are indeed able to participate in national discourse, but they do not necessarily have anything to offer that is distinctive. Nor is there any obvious reason why believers should retain their attachment to a religious body that in its language and thought differs not at all from the secular mainstream. Too little adaptation means irrelevance; too much leads to assimilation and, often, disappearance.
-Philip Jenkins, The Lost History of Christianity, p.245