If I need to understand the passage I suspect is not self-evident, I can read the Catechism or talk to a priest, till that process brings a better understanding. Usually, a reference to the early Church writings closes the deal, if the Catechism is silent. That way, the meaning of a particular verse, say, Matthew 1:25 or Luke 1:28, is understood not through some archaeological analysis of surviving copies, but by evidence of understanding common to the Fathers.
Do I need to elaborate?
BTW the RCC used to say the earth was the center of the universe --- until they didn't. Al Goreish?