Luther seal is the symbol of Lutheranism. This seal was designed by Martin Luther when he was teaching at Wittenberg University. The first image displayed in this seal is a black cross, which is placed in a red heart to remind believers: "We are saved because we believe in Christ crucified." "Because people can be justified as long as they believe in their own hearts." Although the cross is black, deadly and painful, it does not change the color of the heart, nor does it destroy nature, that is to say, it does not kill people, but makes people live. For the righteous will be saved by faith. Faith means believing in Jesus. But this heart is placed in the center of the white rose, indicating that faith produces joy, comfort and peace. Roses are white, not red, because white is the ideal color for angels and elves in the sky. Secondly, this rose is placed on the blue background of the day, indicating that the joy of this spiritual belief is only a token and the beginning of future joy; Although the joy of the future has not yet been revealed, it can be foreseen and grasped through hope. There is a golden circle around the blue background, which shows that this kind of happiness in heaven is endless and more precious than all wealth and treasures, because gold is the best and most precious metal, and the Lord Christ will give eternal grace to believers. The picture on the left shows the title page of the first edition of The Book of Concord printed in Dresden, Germany in 1580. Translated as concordia.yhwh. Christians repeat the undisputed creed, namely, the voters, princes and property, theologians, doctrines and beliefs in augsburg's creed. In addition, some articles have been added to explain in detail that "building in God's Word is the only belief principle". The death blessed by Martin Luther is the subject of debate. guide