This is today’s “word of the day” from Merriam-Webster.
Ex Cathedra – “by virtue of or in the exercise of one’s office or position.”
Mirriam – Webster also added this historical note:
Ex cathedra is a Latin phrase, meaning not “from the cathedral” but “from the chair.” The phrase does have religious origins though: it was originally applied to decisions made by Popes from their thrones. According to Roman Catholic doctrine, a Pope speaking ex cathedra on issues of faith or morals is infallible. In general use, the phrase has come to be used with regard to statements made by people in positions of authority, and it is often used ironically to describe someone speaking with overbearing or unwarranted self-certainty.
God has spoken to us through His Son, Jesus Christ. The words spoken from God by Jesus were delivered to us by those special witnesses who heard Him. Those special witnesses were the apostles of Jesus.
The mystery of God making us righteous was made known to us by those apostles who heard it from Jesus.
Regarding the message of the apostles, Paul tells us in his letter to the church at Galatia, “If anyone, himself or even an angel from heaven, were to preach a gospel or message different from the one spoken by the apostles, that person should be condemned” (Gal. 1:8-9)
We are to trust the word of God.