By what authority was Sunday Sabbath-keeping instituted?

Answer

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

Upon what basis is justification granted?
What did Jesus say of the sacramental wine?
In His first recorded discourse, what did Christ say of the law?
Does the first commandment show who the author of the law is?
Concerning what have we been definitely informed?
How may the- lack of wisdom be supplied?
How often should we pray?

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