By what authority was Sunday Sabbath-keeping instituted?

Answer

By the authority of the Catholic Church. See page 131.

Who was the Rock that went with them?
From whom does faith come?
How did the people of Samaria publicly testify to their faith in the preaching of Philip?
What question did the performing of these miracles lead many to ask?
And how may we know that we love the brethren?
By what may we be partakers of the divine nature?
Does death bring to Christians unassuaged sorrow?

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