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.

To whom did Christ become the author of salvation?
What commandment guards the honor of the mother?
By what law is the knowledge of sin?
When was there a remarkable display of falling stars?
12. Why did Job wish that his words were written in a book, graven with an iron pen and lead in the rock forever?
Did this doctrine exist in ancient times?
To whom is the Epistle of James addressed?

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