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.

In what words was this promise renewed to Abraham?
Into what condition has sin brought the entire creation?
How complete is the salvation obtained in Christ?
To what does the blood of Christ witness?
For what are we told to pray at this time?
By what method of reasoning did Christ justify acts of mercy on the Sabbath day?
7. What reason does God give for the Sabbath's being an everlasting sign between Him and His people?

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