God’s covenant with the Jews concerned one day in seven, and He said, “My covenant I will not break.” Is God a liar, or is your Church wrong?

God is not a liar, and the Catholic Church is not wrong. God Himself predicted in Isaiah II., 2-3, that He would establish a visible Church to which all nations would come, and that out of that Church the law would proceed to teach us His ways. In due time He sent His Son, who established the Catholic Church, and she tells us God’s present law. God has not changed. If you decide to do different successive things, your decision does not change merely because the undertakings change successively. The Jews decided to observe Saturday, while Christians decided to observe Sunday. The seventh day as God’s day was not changed. The Sabbath, God’s rest day, was transferred from Saturday to Sunday.

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