By Fr. Gerald E. Murray, The Catholic Thing - What is a Catholic bishop supposed to teach? The Oath of Fidelity on Assuming an Office to be Exercised in the Name of the Church supplies a succinct answer: “In fulfilling the charge entrusted to me in the name of the Church, I shall hold fast to the deposit of faith in its entirety; I shall faithfully hand it on and explain it, and I shall avoid any teachings contrary to it.”