There have been quitea few comments since I was last in, so I will start by addressing just one - namely the belief that Jesus is the Son of God. Ottovanbis - you stated that this is unreasonable from the outset. I would disagree with you on this. Two sections:
First, things that are objectively true in the present:
1. Two billion other people believe this right now.
2. For the past two thousand years, a large portion of humanity has believed this to be true as a result of the personal account of a number of eye witnesses.
Second, if you examine the lives of the apostles (and disciples) and what they experienced, it would frankly have been unreasonable for them to not believe that Christ was the Son of God. They witnessed Him perform a number of miracles, saw the power and truth of His teaching, and finally, saw him both die, and a few days later, saw Him again, only not dead. Now, if someone actually witnessed this, it would be unreasonable for them to conclude that Christ was a "normal" person. Rather, it is more likely that He was who He said he was, I am who am.
Now, it could easily be argued that all of this was concocted by a bunch of people to get themselves positions of power, but why on earth would anyone want to sign themselves up for a leadership position that almost assured them of an early and painful death if they did not actually believe that what they witnessed was true? I would argue that no one would do that, and as a result, Christianity both endured and grew.
Also, I will once again state that reason and empiricism are not the same thing, and to think so greatly limits your ability to reason. On the particular topic of Christ's divinity, I will first state that it is perfectly reasonable that there is a God and frankly the existence of God is a lot better explanation for existence than anything that has come out of science (another question - what made the big bang go bang or for that matter, how did all the matter get there in the first place?). From this, there is no reason why God could not have a Son that took on human flesh (in particular given the extremely strong evidence for Christ's existence). Also, as far as religion never growing and seeking additional truth, that is also patently false. Within the Catholic tradition in particular, there has always been a search for truth and attempts to use reason to better understand that truth (I would cite St. Thomas Aquinas as an example, though even the current papal encyclicals would attest to this).
Finally, you state that "The best one can do is to start with what can be observed and experimented." Can you acutally show this to be true? This is philosophical statement that presuposes an awful lot. For instance, I think David Hume would question whether or not you can really even believe what you observe. Since we know we can not truly observe anything (just that which it emits/reflects/etc.) so our own knowledge is limited in this capacity. Second, as an example, if I were to state that eugenics is wrong (a statement with which I assume you would agree), how can you prove that empirically? I would actually argue that if you took a purely Darwinian stance (which is what eugenics sprung from incidentally), then eugenics is good because it improves humanity by accelerating our evolution. However, as a society we firmly reject it, even though "empirically" it should produce good results. The reason we reject it is that we place an intrinsic value on human life that has nothing to do with observable evidence, but rather the Natural Law / Divine Law (which is not empirical).