“From that day to the present, the knowledge of God's law has been preserved in the earth, and the Sabbath of the fourth commandment has been kept. Though the “man of sin” succeeded in trampling under foot God's holy day, yet even in the period of his supremacy there were, hidden in secret places, faithful souls who paid it honor. Since the Reformation, there have been some in every generation to maintain its observance. Though often in the midst of reproach and persecution, a constant testimony has been borne to the perpetuity of the law of God, and the sacred obligation of the creation Sabbath.”
—The Great Controversy p453