My goodness, if you only knew how specified things had to be. For example, right now I am at work (it is a slow day ) I am using a computer to type this very post. The computer has a CPU and monitor, with a printer and label maker hooked to it, not to mention the keyboard and things like that.
Now just take the monitor alone. Do you know how much goes in to just making the monitor, how much configuration that had to take place? How much engineering? Not just that, the monitor had to be made to be COMPATIBLE with the CPU. Do you know how precise engineers had to be to make the CPU? How much math goes into it? What about the printer? The CPU has to be able to read the printer, and you can't see what you are printing without the monitor (much less print), and the same thing applies to the label maker. If the label maker wasn't made to be compatible with the computer, then it wouldn't work properly.
This is specified complexity. It is not enough to just have the parts, you have to have the MIND, the intellect to be able to configure the parts together to make it all work. It is not something that happened by random chance. You don't get that kind of precision from a explosion at a Dell computer factory.
Now, if you start the universe off with a big bang at which mindless matter and energy and space began to expand, how do you go from the mindless matter and energy, to a configured human body that can think, eat, reproduce, etc.
That is why I think naturalism is completely irrational, and I don't have the faith to become an atheist.