Read Ellen G. White, “The Impending Conflict,” pp. 582-592, “The Scriptures a Safeguard,” pp. 593-602 and “The Time of Trouble” pp. 613-634 in The Great Controversy. Ellen G. White advocated that Seventh-day Adventists be good citizens and obey the law of the land.
She even told people not to openly and flagrantly disobey local Sunday laws; that is, though they must keep the seventh-day Sabbath holy, as God has commanded, they don’t need to deliberately violate laws that forbid Sunday labor. In one case in particular, however, she was clear that Adventists should not obey the law. If a slave had escaped his or her master, the law required that the slave be returned to that master. She railed against that law and told Adventists not to obey, despite the consequences: “When the laws of men conflict with the word and law of God, we are to obey the latter, whatever the consequences may be. The law of our land requiring us to deliver a slave to his master, we are not to obey, and we must abide the consequences of violating this law. The slave is not the property of any man. God is his rightful master, and man has no right to take God’s workmanship into his hands, and claim him as his own.” – Testimonies for the Church, vol. 1, pp. 201, 202