The Knights of Columbus form a secret society sanctioned by the Catholic Church. How do they differ from Masonry?

The Catholic Answers

In all the points I have enumerated against Masonry. They do not constitute a secret society of the type condemned by the Church. They are prepared to submit all their affairs to ecclesiastical authority. Every member knows that he will never be asked to violate his conscience or injure other people’s rights in virtue of his membership. Their society does not claim to be a new and universal religion, nor do any of its members profess their wish to destroy the Catholic Church.

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