God has a test for us, and if we come up to the standard we shall be a peculiar people. The Sabbath draws a separating line between us and the world, not faintly but in plain, distinct colors. To those who have received the light of this truth the Sabbath is a test; it is not a human requirement, but God’s test. It is what will distinguish between those who serve God and those who serve Him not, and upon this point will come the last great conflict between truth and error. All who profess to keep God’s law should stand united in the sacred observance of His holy Sabbath.... (HP 150.2) MC VC