The only point of disunity is we can't all agree on is the solution, perhaps that is because only God has the solution and He is keeping it a secret from us. He wants us to have FAITH IN ONLY HIM.
Catholics are bound to profess their faith in the Church with four marks - "I believe in the One, Holy, Catholic and Apostolic Church." The Church is an object of divine and Catholic faith. If the sedevacantists were right, and they aren't, the Church with four marks that was founded by Christ would no longer exist. That is one of the many reasons sedevacantism is a heresy.
Actually RT, you're both right....No one can believe in Christ and at the same time not believe in His Church. As Pope Pius XII said referencing St. Paul, Christ and the Church are one:
"The doctrine of the Mystical Body of Christ, which is the Church, was first taught us by the Redeemer Himself" and this has been repeated throughout many papal teachings, St. Augustine also taught that you can never separate Christ from the Church because the two are one.
oh yeah, Thanks Matthew!