Past experience has taught me how easy it is to slip into acrimony when discussing one's beliefs. There is little more foundational or more sensative to our sense of being than our beliefs. Some of us have much thicker hides than other as well. To avoid unnecessary rancor, and in to answer your question "Is there a correct belief system" I offer you the following scripture:
1Cor13:9 For we know in part, and we prophesy in part.
10 But when that which is perfect is come, then that which is in part shall be done away.
11 When I was a child, I spake as a child, I understood as a child, I thought as a child: but when I became a man, I put away childish things.
12 For now we see through a glass, darkly; but then face to face: now I know in part; but then shall I know even as also I am known.
13 And now abideth faith, hope, charity, these three; but the greatest of these is charity.
We see now as through a glass darkly. I have on numerous occasions been tempted to have this one sentence tatooted on my forehead. Yes, there is a correct belief system and safe to say if Paul didn't know it the way he should none of the rest of us does either. We are told to seek it but we are also told that we won't lay hands on it in this life but we should look forward to it when Jesus returns to vest us with new spirits and bodies. Paul has penned an oft quoted passage in 1Cor13 on this same subject and he finishes his thought the same way he did in the passage above. No matter how much scriptural knowlege we acquire, if we don't have love, we're just one more fool banging on a tin cup making so much unprofitable noise.
Another canidate on my forehead ornamentation list is this one:
James 1:19 Wherefore, my beloved brethren, let every man be swift to hear, slow to speak,
I have begun to exchange posts with a very studious, thoughtful and curious Messianic Jew whose response to my posts are positively glacial in comparison to what I normally see in Bible forum postings. Her answers bear witness to the time she had spent considering what I had said before she formed a reply. We would all do well to emulate she.
And last but not least:
Prov 18:13 He that answereth a matter before he heareth it, it is folly and shame unto him.
Even in the written medium we tend to read the first few sentences, form an opion of what the person is trying to say and then form a response to that which we imagine they were going to say. Not good...
and then there's me...
Ecce 5:3 ...a fool's voice is known by multitude of words.