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.

18. When asked by the rich young man the conditions of eternal life, to what did Jesus direct his attention?
How is righteousness received?
How should the truth ever be cherished?
To whom does vengeance belong?
By what method of reasoning did Christ justify acts of mercy on the Sabbath day?
What is implied in a knowledge of God and Jesus Christ?
In what is the Christian to grow?

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