You have no choice but to trust that the Catholic Church was guided by the Holy Spirit in establishing the canon of the Bible, because no one else established it, and no one else could claim authority to. The gnostics also believed that they had a claim on Sacred Scripture, did you know that? How do you know they weren't right and the Catholic Church was wrong? Hmmmm.
The statement, "it predated the Catholic Church by hundreds of years" is not worthy of comment, flying in the face of historical fact and designed solely to deceive. Seeing that the Church was established on Pentecost Sunday, that makes no sense whatsoever.
There is no way that you can reconcile the teachings of the Catholic church with the teachings of the Bible
First of all, EVERYTHING taught by the Church is reconcilable with Scripture.
Now reconcile this: Why is Paul "working out [his] salvation in fear and trembling?"
And with the Catholic's church grand record of providing the best for the people we should continue to blindly believe they are right?
Hardly.. which is why many have choosen to discern for themselves what Christ was teaching.