"Reverend Benton, that is all true, but that was many years ago. The Catholic Church has changed. It does not now teach that the sun revolves around the earth."
"No, the Catholic Church does not teach that now, but it does teach that the pope is infallible in all matters of faith."
"Yes, the pope is infallible in all matters of faith."
"Then if a scientist makes a discovery that the pope thinks is in conflict with his interpretation of the scriptures, it would be the duty of the Catholic Church to oppose that scientific discovery and for any Catholic to believe it would be heresy."
"Yes."
"Isn't that placing the human mind in chains?"
"No, because the pope is infallible. His statement would be correct."
"But popes who were thought to be infallible taught that the earth was the center of the universe and the stars were spiritual lights."
"But, Reverend, that was long ago and the popes do not teach that now."
"Then there have been popes who were not infallible or the popes now are not."