The CHURCH is the pillar and ground of truth. Nowhere does the Bible say the Bible is the pillar and ground of truth. As history reveals, and common sense nods in agreement, the Church preceeded the Canon of the New Testament.
Your lack of knowledge about Scripture and its contents would astound me if you weren't a Catholic. This is not necessarily a slam against Catholics by the way, for my own denomination suffers the same issue amongst the laity. But, it has been my experience with the Catholics I know that they can quote the Catechism or some Marian doctrine but not Scripture. To familiarize yourself with it, first, the church is not called the "pillar and ground of the truth" in Scripture. Scripture gives itself you the answer - but you are too bound by tradition and the shackles of your mind to search it out for yourself. I have posted numerous verses on this thread detailing the role of Scripture in the life of the believer. You can not post a single verse showing that the Church is the ultimate authority in all things.
So, we are at an impasse that involves circular reasoning on both of our parts. I believe that Scripture is the final authority (as it is understood through the Holy Spirit's leading) on all matters of faith and practice because Scripture says it is. You believe that the Roman Catholic is the final authority because the Roman Catholic says it is. We will NEVER agree on this matter. Period.