One of the prooftexts for Catholicism is 1 Tim 3:15. Unfortunately for Catholics, this verse isn’t referring to the church of Rome. In context, it’s referring to the church of Ephesus (cf. 1:3).
It’s a reference to the local church, not the universal church—much less the church of Rome. If, therefore, we’re going to use this verse as a prooftext for a high church ecclesiology, then the church of Ephesus is the pillar and foundation of truth. Roman Catholics are betting on the wrong horse. They should switch their allegiance from Rome to Ephesus. Now that we’ve cleared that up, we look forward to Roman Catholics submitting to the true Vicar of Christ—the bishop of Ephesus.