Did not the Diet of Spires profoundly affect the history of human thought?

It did, but rather for evil than for good. It led to dire results and the wrecking of the Catholic faith in many unthinking people. I am speaking, of course, of those delegates at the Diet who protested against its decisions, and am dealing with religious thought. Scientific thought would have gone on in any case. It is not to Protestantism that we owe the scientific and mechanical progress of modern times. That would have come just the same. But in religion Protestantism has given us only chaos, dreary contradictions, and several millions of would-be infallible individual authorities on religious questions. It was a regression from the authority of God to that of erratic man. And where Protestantism began by pretending to defend the rights of the Bible, it has ended by practically declaring the Bible to be worthless.

Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty