drmorgans - Try looking at the question and eliminating some of the possible answers.
1) There is a first cause for everything. (To me, this first cause is God, but for now, just an acknowledgement of a First Cause will suffice.)
2) Everything came from nothing, therefore the answer is to be found in the, ''something,'' that nothing produced, ie the natural universe.
3) Accepting that time itself began with the Big Bang, it is impossible to say, ''before, preexisting etc,'' but we can try to say that everything we know grew out of something that was not nothing. (Add to this list for both of our benefit.)
If I remove what is logically impossible, I am left with an undisputed, uncaused first cause, option number one.
What do you think?