The Lutheran Seal
In a letter of 1530 to a friend, Luther explained the meaning of the seal thus:
The first thing expressed in my seal is a cross, black, within the heart, to put me in mind that faith in Christ crucified saves us. “For with the heart man believeth unto righteousness.”
Now, although the cross is black, mortified, and intended to cause pain, yet it does not change the colour of the heart, does not destroy nature – i.e., does not kill, but keeps alive. “For the just shall live by faith,” – by faith in the Saviour.
But this heart is fixed upon the centre of a white rose, to show that faith causes joy, consolation and peace. The rose is white, not red, because white is the ideal colour of all angels and blessed spirits.
This rose, moreover, is fixed in a sky-coloured ground, to denote that such joy of faith in the spirit is but an earnest and beginning of heavenly joy to come, as anticipated and held by hope, though not yet revealed.
And around this ground base is a golden ring, to signify that such bliss in heaven is endless, and more precious than all joys and treasures, since gold is the best and most precious metal. Christ, our dear Lord, He will give grace unto eternal life.