“The Lord has a special message for His ambassadors to bear. The Sabbath has been made a nonentity, an unessential requirement, which human authority can set aside. The holy day of the Lord has been changed to a common working day…  The last message of warning to the world is to lead men to see the importance that God attaches to His law. So plainly is the truth to be presented that no transgressor, hearing it, shall be excusable in failing to discern the importance of obedience to God’s commands. I am instructed to say, Gather from the Scriptures the proofs that God has sanctified the seventh day, and let these proofs be read before the congregation. Let those who have not heard the truth be shown that all who turn aside from a plain “Thus saith the Lord,” must suffer the result of their course. In all ages the Sabbath has been the test of loyalty to God.”
Evangelism p. 225-226