I can do that. Law of conservation of matter states that matter can't just come from nowhere. SOMETHING has to be exchanged for it. Now, it's illogical that the universe has "just always been there" so it must have appeared that some point along the way. The problem is, the law of conservation of mass doesn't allow for this stuff to just start getting created on it's own, so technically we should [sic] exsist.
Not too shabby, but this is an old argument, so there are several good counter-arguments already around.
The first one is the simplest: if something can't be created out of nothing, where did God come from? Unfortunately, this one never works, as most believers are fairly convinced that God is above the rules.
Luckily, the second is almost as simple, albeit trickier to grasp. Before the Big Bang, there was nothing, yes? This means that
time didn't exist, so really the phrase "before the Big Bang" is meaningless. The universe has always existed because it has existed for as long as time has. That being the case, matter and energy have always existed as well. This may seem like cheating, but that's science for you.
If you're still irrevocably opposed to the Big Bang theory, the Big Crunch theory might be a bit more appealing. It essentially states that the universe is continually expanding and collapsing inward upon itself. Because this is an endless cycle, the theory implies that the universe has always existed. Of course, this would mean that time is also collapsing and expanding, so "has always existed" is just semantics. This is complicated stuff, so I can hardly blame you if Creation appeals more to you.
However, science is currently not able to understand the material the spirit is made of, and for all science knows it coudl totall be self creating and spriti energy could for all we know be used to create matter.
Excellent. If you happen to find some spirit floating around somewhere, be sure to show it to a cosmologist.
There, just backed up my beleifs with science for you. God bless.
Well, it's the thought that counts.