Please listen here while you enjoy this daily meditation.
“The error of those who say that the Vicar of Christ, the Pontiff of the Roman Church, does not have a primacy over the universal Church is similar to the error of those who say that the Holy Spirit does not proceed from the Son. For Christ himself, the Son of God, consecrates and marks her as his own with the Holy Spirit, as it were with his own character and seal, as the authorities already cited make abundantly clear. And in like manner the Vicar of Christ by his primacy and foresight as a faithful servant keeps the Church Universal subject to Christ. It must, then, be shown from texts of the aforesaid Greek Doctors that the Vicar of Christ holds the fullness of power over the whole Church of Christ.
Thomas Aquinas, Against the Errors of the Greeks, Bk 2, 32.