First of all, I'm not arguing against the Church. I'm just trying to push things as far as possible so that we can get as deeply into the truth as possible.
Trinity, you missed my point, I think. When I gave the quote about finding the meaning of life under a rock, I specifically, and rather obviously, meant that the meaning of life is NOT to be found in material things, but one does not need to be religious to know this. I was just pointing out how much happiness one can find in the purely natural state, without reference to religion. Augustine was saying he couldn't find God in material things, and I didn't contradict that.
As for the sacraments, of course I've received them many times, but you cannot feel anything in them. It might even be heresy to say you can, since they operate at the level of grace. That's why for me the experience of them does not affect the question of truth. A muslim can say he feels a certain way after praying to Allah; that hardly proves Islam.
Ancilla, of course the civilization that one is in does not affect the truth of Catholicism, in the strict logical sense. But we may as well say that it does, since Catholicism depended on the late Roman Empire to prop it up and medieval Christendom to sustain it for a millenium. The church is very much based on civilization (in a practical sense; I know theologically it's not) because without Constantine, without Charlemagne, without medieval kings, without rulers who supported missionaries to the New World and Asia, where would it be? How would it have spread? These things would have been impossible without civilization. If you are a Catholic you are committed to Western Civilization. But why should we presume that civilization to be different from every other civilization in the history of the world?