Tuesday, Week 1: "he taught them as one having authority"

The people were astonished

-- Mk 1:14-20

The supreme degree of participation in the authority of Christ is ensured by the charism of infallibility. This infallibility extends as far as does the deposit of divine Revelation; it also extends to all those elements of doctrine, including morals, without which the saving truths of the faith cannot be preserved, explained, or observed.

-- CCC 2035