That is a paradox here, if everything is caused by something and that something is caused by something else, then indeed it appears that even God making the cosmos for a reason (out of love for example) is not enough of an explanation. Why did he made the cosmos at a specific time (the beginning of time)? He didn't love it before that? Being outside of time is not an excuse either. If the world is supposed to end one day then will the cosmos disappear? Is the chain of reaction going to stop there? So what, the devil is the reason there is cause and causality when all God wanted was to perform an action without reaction?
All the above seem to contradict anything you may think and it all comes down to perceiving time as a linear portion. That is a line with a beginning and an end. But as I stated on another topic, (
http://forums.animesuki.com/showthread.php?t=89061) if time is not perceived as linear but as a dot (zero dimensions) then everything makes sense.
Just think about it. The answers will pop up by themselves.