Last week a couple in San Diego was issued a cease and desist order from the county for holding a Bible Study in their home. The reason they were given was that they needed a costly permit to hold a religious assembly in their home. The county has since backed off saying that they do not want to "muzzle religious expression". However, I can't help but wonder if this is a harbinger of what is to come. We all hear so much about how we are now living in a "post-Christian" society, but the question is whether or not we really are.
In response to the question if we are living in a post-Christian world, I would say absolutely not. I say this not because I am in denial as to what is going on around us, but because it simply is not possible. I am with Chesterton when he summarizes the history of Western Civilization by saying that "paganism was the biggest thing in the world; and Christianity was bigger, and everything else has been comparatively small." The Second Person of the Trinity taking on flesh and dwelling among us is the hinge point on which all of history rests. This is so firmly established and known by all that even changing BC to BCE and AD to CE only serves to point this out further. It shows us that something unbelievable happened so that history ends and starts a new era at that point in time.
That being said, what I think someone means when they say that we live in a "post-Christian" world, is that our culture no longer rests upon its religious roots. This statement I do agree with, but the religious roots were not really Christian anyway. Instead, I think it was based on a sort of vague belief in God with a strong ethical code that happened to coincide with the Judeo-Christian moral code. What has happened is that the social compulsion to be a Christian has been removed and people are now "religious" because they genuinely want to know Christ.
As we have been told by the visionary John in the book of Revelation, it is hanging out in the middle ground that makes Christ sick (Rev 3:16—the literal meaning of spit is to "vomit"). That is why I think the decline is a good thing—it has effectively removed the middle ground. The time has come where we are either for Christ or against Him (Mt 12:30). Isn't this precisely what happened with President Obama's visit to Notre Dame? It did not divide the Church, it defined it. You are either Catholic and condemn the President's stance or you are not Catholic. You cannot be both. It is really that simple.
For too long because we were surrounded by other "good people" who had the same value system that we had, we were lulled into thinking that we were not at war. But the fact of the matter is that we have never ceased being the Church Militant. We simply forgot for a while. The battlefield may change over time, but the war continues on. We are now able to see the battle lines being drawn more clearly and this is a good thing. It is precisely when the awareness that we are at war and we are persecuted that the Church actually grows. This is can be shown empirically throughout time and even in our own time. When the Communists took over China in 1949, approximately 1% of the population was baptized. Now, because of the ongoing persecutions the number has grown to approximately 130 million, nearly twice the number of members in the Communist Party.
Once we recognize that we are at war, we can then see our enemies more clearly. Our enemies are not Liberals or Atheists. Our enemies are not the media or abortionists themselves. These are all the people that we are fighting for, not against. As St. Paul says in Ephesians (6:12), "our struggle is not with flesh and blood but with the principalities, with the powers, with the world rulers of this present darkness, with the evil spirits in the heavens." We must be absolutely clear who we are engaged in battle against—Satan and his minions.
We must also be clear on who are allies are. Protestants are our allies. How much do you think Satan relishes in the fact that we are divided? The Jews are our allies too as we stand together waiting for the return of the Messiah at the end of time (CCC 840). Even the Muslims are our allies as they worship the one, merciful God with us (CCC 841).
To close, I want to say one other thing that is vitally important and that is that we, as Catholics, must be the ones leading the charge in the war. The reason is very simple—we have the Eucharist. Contained under the appearance of a simple piece of bread is the Sacramental Presence of God Himself. We must avail ourselves to Him so that in receiving His Body, we will be empowered to give our own for the fight. "The blood of martyrs is the seed of the Church" and it is precisely with more martyrs and more saints that we will win the war.