What do Catholics say of the observance of Sunday by Protestants?

Answer

"It was the Catholic Church which, by the authority of Jesus Christ, has transferred this rest to the Sunday
in remembrance of the resurrection of our Lord. Thus the observance of Sunday by the Protestants is an
homage they pay, in spite of themselves, to the authority of the [Catholic] church. "-"Plain Talk About the
Protestantism of Today," by Mgr. Segur, page 213.

By what are men sanctified?
How had Christ's teaching by parables been foretold?
How were the two on the way to Emmaus affected by Christ's conversation with them?
For what reason is worship justly due to God?
Why did the Lord destroy Sodom?
Why is it better to go to the house of mourning than to the house of feasting?
What is to become of our earth in the day of the Lord?

Questions & Answers are from the book Bible Readings for the Home Circle